Ryan David Leaf (born May 15, 1976) is an American former professional football player who was a quarterback for four seasons in the National Football League (NFL). He played for the San Diego Chargers and the Dallas Cowboys between 1998 and 2001, and also played for the Tampa Bay Buccaneers and the Seattle Seahawks. Leaf played college football with the Washington State Cougars, finishing as a finalist for the Heisman Trophy after his junior year.

Description above from the Wikipedia article Ryan Leaf, licensed under CC-BY-SA, full list of contributors on Wikipedia.