Bill Bergey was traded to the Philadelphia Eagles prior to the 1974 season after spending 5 seasons with the Bengals. Long story short, he signed to play with the World Football League's Florida Blazers; it was a future's contract, it never happened, ended up dealt to Philly. I would argue that he was the catalyst for the rise of the Eagles from 1978 - 1980.
The image on the left was my first introduction to Mr. Bergey. My first All-Pro card, or at least the first one to make an impression. The Topps, 1979 Bill Bergey. This guy was a wrecking crew. Finished his career with 27 interceptions and 21 fumble recoveries. 5 time All-Pro, 2 time First Team All Pro.
Take a look at the links below.