According to the Oklahoman, Oklahoma running back DeMarco Murray left Friday’s practice with an apparent left hamstring injury. The 6’1, 214 lb. junior has had an astounding career as a Sooner, but it has been injury plagued. Murray missed 3 games in 2007 after dislocating his kneecap, and he also missed 3 games in 2008 after suffering an injury to his hamstring. He did not play in last year’s BCS Championship game against Florida. Before the injury last year he...