References analysis of the Wikipedia article "List of Major League Baseball annual ERA leaders" in the English version

baseball-reference.com

"George Bradley Statistics and History". Baseball-Reference.com. Archived from the original on February 6, 2010. Retrieved February 17, 2010.

"Cy Young Statistics and History". Baseball-Reference.com. Archived from the original on February 10, 2009. Retrieved February 17, 2010.

"Lefty Grove Statistics and History". Baseball-Reference.com. Archived from the original on April 14, 2011. Retrieved February 17, 2010.

"Roger Clemens Statistics and History". Baseball-Reference.com. Archived from the original on January 4, 2010. Retrieved February 17, 2010.

"Sandy Koufax Statistics and History". Baseball-Reference.com. Archived from the original on February 28, 2009. Retrieved February 17, 2010.

"Christy Mathewson Statistics and History". Baseball-Reference.com. Archived from the original on March 25, 2021. Retrieved February 17, 2010.

"Clayton Kershaw Statistics and History". Baseball-Reference.com. Archived from the original on July 16, 2022. Retrieved October 1, 2017.

"Walter Johnson Statistics and History". Baseball-Reference.com. Archived from the original on May 8, 2018. Retrieved February 17, 2010.

"Pedro Martinez Statistics and History". Baseball-Reference.com. Archived from the original on January 4, 2010. Retrieved February 17, 2010.

"Tim Keefe Statistics and History". Baseball-Reference.com. Archived from the original on April 27, 2011. Retrieved February 17, 2010.

"Dutch Leonard Statistics and History". Baseball-Reference.com. Archived from the original on April 18, 2018. Retrieved February 17, 2010.

"Yearly League Leaders & Records for Earned Run Average". Baseball-Reference.com. Archived from the original on September 2, 2019. Retrieved February 17, 2010.

"Allan Anderson Statistics and History". Baseball-Reference.com. Archived from the original on July 8, 2019. Retrieved February 17, 2010.

"Teddy Higuera Statistics and History". Baseball-Reference.com. Archived from the original on January 4, 2010. Retrieved February 17, 2010.

"Luis Tiant Statistics and History". Baseball-Reference.com. Archived from the original on May 30, 2009. Retrieved February 17, 2010.

"Gaylord Perry Statistics and History". Baseball-Reference.com. Archived from the original on February 12, 2010. Retrieved February 17, 2010.

"Mark Fidrych Statistics and History". Baseball-Reference.com. Archived from the original on April 15, 2009. Retrieved February 17, 2010.

"Vida Blue Statistics and History". Baseball-Reference.com. Archived from the original on April 30, 2011. Retrieved February 17, 2010.

"Tommy Bond Statistics and History". Baseball-Reference.com. Retrieved February 22, 2010.

"Jake Peavy Statistics and History". Baseball-Reference.com. Retrieved February 22, 2010.

"1876 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on December 12, 2009. Retrieved January 31, 2010.

"1877 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on November 15, 2009. Retrieved January 31, 2010.

"1878 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on August 7, 2010. Retrieved January 31, 2010.

"1879 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on January 23, 2010. Retrieved January 31, 2010.

"1880 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on January 23, 2010. Retrieved January 31, 2010.

"1881 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on January 22, 2010. Retrieved January 31, 2010.

"1882 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on February 13, 2010. Retrieved January 31, 2010.

"1883 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on January 11, 2010. Retrieved January 31, 2010.

"1884 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on January 11, 2010. Retrieved January 31, 2010.

"1885 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on January 11, 2010. Retrieved January 31, 2010.

"1886 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on January 13, 2010. Retrieved January 31, 2010.

"1887 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on January 2, 2010. Retrieved January 31, 2010.

"1888 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on January 9, 2010. Retrieved January 31, 2010.

"1889 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on January 23, 2010. Retrieved January 31, 2010.

"1890 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on March 12, 2010. Retrieved January 31, 2010.

"1891 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on October 31, 2022. Retrieved January 31, 2010.

"1892 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on February 17, 2010. Retrieved January 31, 2010.

"1893 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on March 12, 2010. Retrieved January 31, 2010.

"1894 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on March 12, 2010. Retrieved January 31, 2010.

"1895 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on March 12, 2010. Retrieved January 31, 2010.

"1896 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.

"1897 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on February 17, 2010. Retrieved January 31, 2010.

"1898 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on March 11, 2010. Retrieved January 31, 2010.

"1899 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on March 12, 2010. Retrieved January 31, 2010.

"1900 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on March 12, 2010. Retrieved January 31, 2010.

"1901 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on March 13, 2010. Retrieved January 31, 2010.

"1902 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on February 15, 2010. Retrieved January 31, 2010.

"1903 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on March 15, 2010. Retrieved January 31, 2010.

"1904 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on March 13, 2010. Retrieved January 31, 2010.

"1905 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on November 21, 2009. Retrieved January 31, 2010.

"1906 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on November 19, 2009. Retrieved January 31, 2010.

"1907 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on January 17, 2010. Retrieved January 31, 2010.

"1908 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on January 17, 2010. Retrieved January 31, 2010.

"1909 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on November 19, 2009. Retrieved January 31, 2010.

"1910 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on November 26, 2009. Retrieved January 31, 2010.

"1911 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on October 23, 2009. Retrieved January 31, 2010.

"1912 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on February 12, 2010. Retrieved January 31, 2010.

"1913 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on February 14, 2010. Retrieved January 31, 2010.

"1914 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on February 14, 2010. Retrieved January 31, 2010.

"1915 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on March 7, 2021. Retrieved January 31, 2010.

"1916 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on March 8, 2021. Retrieved January 31, 2010.

"1917 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on January 6, 2010. Retrieved January 31, 2010.

"1918 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on February 14, 2010. Retrieved January 31, 2010.

"1919 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on February 22, 2010. Retrieved January 31, 2010.

"1920 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on August 1, 2021. Retrieved January 31, 2010.

"1921 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on February 17, 2010. Retrieved January 31, 2010.

"1922 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on February 26, 2010. Retrieved January 31, 2010.

"1923 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on February 17, 2010. Retrieved January 31, 2010.

"1924 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on September 4, 2009. Retrieved January 31, 2010.

"1925 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on February 8, 2010. Retrieved January 31, 2010.

"1926 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on January 11, 2010. Retrieved January 31, 2010.

"1927 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on April 17, 2010. Retrieved January 31, 2010.

"1928 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on September 4, 2009. Retrieved January 31, 2010.

"1929 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on February 17, 2010. Retrieved January 31, 2010.

"1930 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on February 17, 2010. Retrieved January 31, 2010.

"1931 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on September 4, 2009. Retrieved January 31, 2010.

"1932 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.

"1933 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on February 14, 2010. Retrieved January 31, 2010.

"1934 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on January 5, 2010. Retrieved January 31, 2010.

"1935 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on February 17, 2010. Retrieved January 31, 2010.

"1936 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on February 17, 2010. Retrieved January 31, 2010.

"1937 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on February 27, 2010. Retrieved January 31, 2010.

"1938 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on November 25, 2009. Retrieved January 31, 2010.

"1939 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on February 11, 2010. Retrieved January 31, 2010.

"1940 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on April 6, 2022. Retrieved January 31, 2010.

"1941 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on April 6, 2022. Retrieved January 31, 2010.

"1942 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on March 27, 2010. Retrieved January 31, 2010.

"1943 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.

"1944 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on April 11, 2010. Retrieved January 31, 2010.

"1945 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on May 26, 2010. Retrieved January 31, 2010.

"1946 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on October 28, 2010. Retrieved January 31, 2010.

"1947 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on September 4, 2009. Retrieved January 31, 2010.

"1948 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on September 4, 2009. Retrieved January 31, 2010.

"1949 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.

"1950 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on February 27, 2010. Retrieved January 31, 2010.

"1951 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on January 29, 2010. Retrieved January 31, 2010.

"1952 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on January 17, 2010. Retrieved January 31, 2010.

"1953 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on January 17, 2010. Retrieved January 31, 2010.

"1954 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on January 17, 2010. Retrieved January 31, 2010.

"1955 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on February 14, 2010. Retrieved January 31, 2010.

"1956 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on March 2, 2022. Retrieved January 31, 2010.

"1957 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on April 9, 2009. Retrieved January 31, 2010.

"1958 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on February 27, 2010. Retrieved January 31, 2010.

"1959 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on March 2, 2022. Retrieved January 31, 2010.

"1960 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on February 14, 2010. Retrieved January 31, 2010.

"1961 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on July 27, 2009. Retrieved January 31, 2010.

"1962 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on January 2, 2010. Retrieved January 31, 2010.

"1963 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on June 17, 2018. Retrieved January 31, 2010.

"1964 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on September 5, 2009. Retrieved January 31, 2010.

"1965 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on June 17, 2018. Retrieved January 31, 2010.

"1966 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on June 17, 2018. Retrieved January 31, 2010.

"1967 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on January 22, 2010. Retrieved January 31, 2010.

"1968 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on September 22, 2018. Retrieved January 31, 2010.

"1969 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on November 5, 2011. Retrieved January 31, 2010.

"1970 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on January 2, 2010. Retrieved January 31, 2010.

"1971 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.

"1972 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on March 5, 2010. Retrieved January 31, 2010.

"1973 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on May 14, 2009. Retrieved January 31, 2010.

"1974 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on February 26, 2010. Retrieved January 31, 2010.

"1975 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on January 22, 2010. Retrieved January 31, 2010.

"1976 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on January 5, 2010. Retrieved January 31, 2010.

"1977 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on February 26, 2010. Retrieved January 31, 2010.

"1978 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on June 20, 2023. Retrieved January 31, 2010.

"1979 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on June 20, 2023. Retrieved January 31, 2010.

"1980 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on July 11, 2010. Retrieved January 31, 2010.

"1981 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on February 22, 2010. Retrieved January 31, 2010.

"1982 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on April 29, 2011. Retrieved January 31, 2010.

"1983 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on November 24, 2009. Retrieved January 31, 2010.

"1984 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on January 29, 2010. Retrieved January 31, 2010.

"1985 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on January 25, 2010. Retrieved January 31, 2010.

"1986 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on February 8, 2010. Retrieved January 31, 2010.

"1987 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on August 14, 2019. Retrieved January 31, 2010.

"1988 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on July 30, 2009. Retrieved January 31, 2010.

"1989 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on January 15, 2010. Retrieved January 31, 2010.

"1990 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on December 17, 2009. Retrieved January 31, 2010.

"1991 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on January 15, 2010. Retrieved January 31, 2010.

"1992 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on September 5, 2009. Retrieved January 31, 2010.

"1993 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on September 5, 2009. Retrieved January 31, 2010.

"1994 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on August 7, 2009. Retrieved January 31, 2010.

"1995 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on July 17, 2009. Retrieved January 31, 2010.

"1996 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on February 12, 2010. Retrieved January 31, 2010.

"1997 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on February 12, 2010. Retrieved January 31, 2010.

"1998 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on September 4, 2009. Retrieved January 31, 2010.

"1999 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on September 4, 2009. Retrieved January 31, 2010.

"2000 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on July 22, 2019. Retrieved January 31, 2010.

"2001 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on July 15, 2009. Retrieved January 31, 2010.

"2002 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on September 4, 2009. Retrieved January 31, 2010.

"2003 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on April 16, 2009. Retrieved January 31, 2010.

"2004 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on October 29, 2009. Retrieved January 31, 2010.

"2005 National League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.

"2006 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on August 12, 2009. Retrieved January 31, 2010.

"2007 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on September 6, 2009. Retrieved January 31, 2010.

"2008 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on June 16, 2009. Retrieved January 31, 2010.

"2009 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on May 19, 2009. Retrieved January 31, 2010.

"2010 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on April 20, 2010. Retrieved October 7, 2010.

"2011 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on April 2, 2024. Retrieved September 29, 2011.

"2012 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on October 3, 2012. Retrieved October 4, 2012.

"2013 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on September 21, 2013. Retrieved September 30, 2013.

"2014 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on September 24, 2014. Retrieved September 24, 2014.

"2015 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on October 7, 2015. Retrieved October 5, 2015.

"2016 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on October 1, 2020. Retrieved October 2, 2016.

"2017 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on October 2, 2017. Retrieved October 1, 2017.

"2018 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on September 29, 2019. Retrieved September 29, 2019.

"2019 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on September 29, 2019. Retrieved September 29, 2019.

"2020 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on March 25, 2021. Retrieved September 27, 2020.

"2021 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on October 3, 2021. Retrieved October 3, 2021.

"2022 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on October 5, 2022. Retrieved October 5, 2022.

"2023 National League Pitching Leaders". Baseball-Reference.com. Archived from the original on October 4, 2023. Retrieved October 1, 2023.

"2024 National League Pitching Leaders". Baseball-Reference.com. Retrieved September 30, 2024.

"Single-Season Leaders & Records for Wins". Baseball-Reference.com. Retrieved February 22, 2010.

"Babe Ruth Statistics and History". Baseball-Reference.com. Retrieved February 22, 2010.

"Most Valuable Player MVP Awards & Cy Young Awards Winners". Baseball-Reference.com. Retrieved February 22, 2010.

"1901 American League Pitching Leaders". Baseball-Reference.com. Archived from the original on February 27, 2010. Retrieved January 31, 2010.

"1902 American League Pitching Leaders". Baseball-Reference.com. Archived from the original on March 11, 2010. Retrieved January 31, 2010.

"1903 American League Pitching Leaders". Baseball-Reference.com. Archived from the original on March 12, 2010. Retrieved January 31, 2010.

"1904 American League Pitching Leaders". Baseball-Reference.com. Archived from the original on March 13, 2010. Retrieved January 31, 2010.

"1905 American League Pitching Leaders". Baseball-Reference.com. Archived from the original on January 6, 2010. Retrieved January 31, 2010.

"1906 American League Pitching Leaders". Baseball-Reference.com. Archived from the original on February 21, 2010. Retrieved January 31, 2010.

"1907 American League Pitching Leaders". Baseball-Reference.com. Archived from the original on November 8, 2017. Retrieved January 31, 2010.

"1908 American League Pitching Leaders". Baseball-Reference.com. Archived from the original on December 13, 2009. Retrieved January 31, 2010.

"1909 American League Pitching Leaders". Baseball-Reference.com. Archived from the original on December 13, 2009. Retrieved January 31, 2010.

"1910 American League Pitching Leaders". Baseball-Reference.com. Archived from the original on January 1, 2010. Retrieved January 31, 2010.

"1911 American League Pitching Leaders". Baseball-Reference.com. Archived from the original on January 3, 2010. Retrieved January 31, 2010.

"1912 American League Pitching Leaders". Baseball-Reference.com. Archived from the original on November 8, 2017. Retrieved January 31, 2010.

"1913 American League Pitching Leaders". Baseball-Reference.com. Archived from the original on April 26, 2021. Retrieved January 31, 2010.

"1914 American League Pitching Leaders". Baseball-Reference.com. Archived from the original on January 2, 2010. Retrieved January 31, 2010.

"1915 American League Pitching Leaders". Baseball-Reference.com. Archived from the original on December 19, 2009. Retrieved January 31, 2010.

"1916 American League Pitching Leaders". Baseball-Reference.com. Archived from the original on October 16, 2021. Retrieved January 31, 2010.

"1917 American League Pitching Leaders". Baseball-Reference.com. Archived from the original on October 16, 2021. Retrieved January 31, 2010.

"1918 American League Pitching Leaders". Baseball-Reference.com. Archived from the original on April 21, 2021. Retrieved January 31, 2010.

"1919 American League Pitching Leaders". Baseball-Reference.com. Archived from the original on December 29, 2009. Retrieved January 31, 2010.

"1920 American League Pitching Leaders". Baseball-Reference.com. Archived from the original on February 26, 2010. Retrieved January 31, 2010.

"1921 American League Pitching Leaders". Baseball-Reference.com. Archived from the original on February 26, 2010. Retrieved January 31, 2010.

"1922 American League Pitching Leaders". Baseball-Reference.com. Archived from the original on March 8, 2021. Retrieved January 31, 2010.

"1923 American League Pitching Leaders". Baseball-Reference.com. Archived from the original on March 8, 2021. Retrieved January 31, 2010.

"1924 American League Pitching Leaders". Baseball-Reference.com. Archived from the original on July 24, 2019. Retrieved January 31, 2010.

"1925 American League Pitching Leaders". Baseball-Reference.com. Archived from the original on July 26, 2019. Retrieved January 31, 2010.

"1926 American League Pitching Leaders". Baseball-Reference.com. Retrieved January 31, 2010.

"1927 American League Pitching Leaders". Baseball-Reference.com. Archived from the original on December 14, 2009. Retrieved January 31, 2010.

"1928 American League Pitching Leaders". Baseball-Reference.com. Archived from the original on September 5, 2009. Retrieved January 31, 2010.

"1929 American League Pitching Leaders". Baseball-Reference.com. Archived from the original on September 5, 2009. Retrieved January 31, 2010.

"1930 American League Pitching Leaders". Baseball-Reference.com. Archived from the original on September 5, 2009. Retrieved January 31, 2010.

"1931 American League Pitching Leaders". Baseball-Reference.com. Archived from the original on September 5, 2009. Retrieved January 31, 2010.

"1932 American League Pitching Leaders". Baseball-Reference.com. Archived from the original on March 9, 2021. Retrieved January 31, 2010.

"1933 American League Pitching Leaders". Baseball-Reference.com. Archived from the original on September 5, 2009. Retrieved January 31, 2010.

"1934 American League Pitching Leaders". Baseball-Reference.com. Archived from the original on September 5, 2009. Retrieved January 31, 2010.

"1935 American League Pitching Leaders". Baseball-Reference.com. Archived from the original on March 9, 2021. Retrieved January 31, 2010.

"1936 American League Pitching Leaders". Baseball-Reference.com. Archived from the original on March 8, 2021. Retrieved January 31, 2010.

"1937 American League Pitching Leaders". Baseball-Reference.com. Archived from the original on March 8, 2021. Retrieved January 31, 2010.

"1938 American League Pitching Leaders". Baseball-Reference.com. Archived from the original on March 8, 2021. Retrieved January 31, 2010.

"1939 American League Pitching Leaders". Baseball-Reference.com. Archived from the original on March 10, 2021. Retrieved January 31, 2010.

"1940 American League Pitching Leaders". Baseball-Reference.com. Archived from the original on September 5, 2009. Retrieved January 31, 2010.

"1941 American League Pitching Leaders". Baseball-Reference.com. Archived from the original on January 16, 2010. Retrieved January 31, 2010.

"1942 American League Pitching Leaders". Baseball-Reference.com. Archived from the original on January 15, 2010. Retrieved January 31, 2010.

"1943 American League Pitching Leaders". Baseball-Reference.com. Archived from the original on November 6, 2020. Retrieved January 31, 2010.

"1944 American League Pitching Leaders". Baseball-Reference.com. Archived from the original on January 14, 2010. Retrieved January 31, 2010.

"1945 American League Pitching Leaders". Baseball-Reference.com. Archived from the original on May 9, 2021. Retrieved January 31, 2010.

"1946 American League Pitching Leaders". Baseball-Reference.com. Archived from the original on February 10, 2010. Retrieved January 31, 2010.

"1947 American League Pitching Leaders". Baseball-Reference.com. Archived from the original on February 9, 2010. Retrieved January 31, 2010.

"1948 American League Pitching Leaders". Baseball-Reference.com. Archived from the original on December 24, 2020. Retrieved January 31, 2010.

"1949 American League Pitching Leaders". Baseball-Reference.com. Archived from the original on July 27, 2009. Retrieved January 31, 2010.

"1950 American League Pitching Leaders". Baseball-Reference.com. Archived from the original on March 24, 2010. Retrieved January 31, 2010.

"1951 American League Pitching Leaders". Baseball-Reference.com. Archived from the original on September 20, 2019. Retrieved January 31, 2010.

"1952 American League Pitching Leaders". Baseball-Reference.com. Archived from the original on February 2, 2021. Retrieved January 31, 2010.

"1953 American League Pitching Leaders". Baseball-Reference.com. Archived from the original on November 8, 2009. Retrieved January 31, 2010.

"1954 American League Pitching Leaders". Baseball-Reference.com. Archived from the original on January 9, 2010. Retrieved January 31, 2010.

"1955 American League Pitching Leaders". Baseball-Reference.com. Archived from the original on February 21, 2010. Retrieved January 31, 2010.

"1956 American League Pitching Leaders". Baseball-Reference.com. Archived from the original on January 6, 2010. Retrieved January 31, 2010.

"1957 American League Pitching Leaders". Baseball-Reference.com. Archived from the original on January 22, 2021. Retrieved January 31, 2010.

"1958 American League Pitching Leaders". Baseball-Reference.com. Archived from the original on May 27, 2020. Retrieved January 31, 2010.

"1959 American League Pitching Leaders". Baseball-Reference.com. Archived from the original on December 19, 2009. Retrieved January 31, 2010.

"1960 American League Pitching Leaders". Baseball-Reference.com. Archived from the original on December 21, 2020. Retrieved January 31, 2010.

"1961 American League Pitching Leaders". Baseball-Reference.com. Archived from the original on December 31, 2009. Retrieved January 31, 2010.

"1962 American League Pitching Leaders". Baseball-Reference.com. Archived from the original on February 4, 2010. Retrieved January 31, 2010.

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