"NFL 100 Greatest" counts down the top 100 game changers in NFL history, and the trade of running back Herschel Walker (between the Dallas Cowboys and Minnesota Vikings) in 1989 lands at No. 39.

Walker, a College Football Hall of Famer who ... PEOPLE's free daily newsletter to stay up-to-date on the best of what PEOPLE has to offer. Herschel Walker Faces New Allegations of Violence ...