Analysis of information sources in references of the Wikipedia article "Bill Bergey" in English language version.
July 10, 1974: The Eagles traded a 1st-round pick in 1976 and 1st- and 2nd-round picks in 1977 to the Bengals for Bill Bergey: Bergey became a 1st-team all-pro in his first year with the Eagles and made the Pro Bowl in each of his first five years here. He retired after the 1980 Super Bowl season and is now in the Eagles Hall of Fame. The Bengals used the picks they got from the Eagles to select Wilson Whitley, Ross Browner and Ray Griffin.
The trade silenced a squabble between the Bengals and Bergey, a 6‐foot‐3‐inch, 243‐pound middle linebacker, over his jump to the W.F.L.'s Florida Blazers, effective with the 1976 season. Coach Paul Brown said Bergey went to the Eagles 'with no strings attached. Bill had not received his July 1 bonus payment from the W.F.L. Orlando team, and Orlando was willing to release its contract with Bergey.'