Although he was in the majors as early as 1908, Major League rules at the time stipulated that a player was considered a rookie until he has had more than 130 at-bats in a season.[1]نسخة محفوظة 23 سبتمبر 2015 على موقع واي باك مشين.
"The Baseball Page". thebaseballpage.com/players/jacksjo01.php. مؤرشف من الأصل في 2010-04-04. اطلع عليه بتاريخ 2006-12-11.
web.archive.org
Although he was in the majors as early as 1908, Major League rules at the time stipulated that a player was considered a rookie until he has had more than 130 at-bats in a season.[1]نسخة محفوظة 23 سبتمبر 2015 على موقع واي باك مشين.
"The Baseball Page". thebaseballpage.com/players/jacksjo01.php. مؤرشف من الأصل في 2010-04-04. اطلع عليه بتاريخ 2006-12-11.