Sooners quarterback Sam Bradford reinjured his right shoulder early in No. 20 Oklahoma's game against No. 3 Texas on Saturday.
Bradford -- the reigning Heisman Trophy winner who returned to action just last week -- was jerked down by Longhorns cornerback Aaron Williams while running backwards trying to get away from the defender on Oklahoma's second drive.
Williams got Bradford by the waist, but the quarterback landed on his shoulder and began writhing in pain right away.
Landry Jones replaced Bradford, who was being treated on the sideline.
Copyright AP - Associated Press
