Adrian Peterson hasn't been all that happy the last few days -- at least on the football field.
The Oklahoma running back has been a little disappointed he hasn't been able to participate fully in the Sooners' spring drills. The blue shirt he's worn for OU scrimmages has turned that work into a glorified two-hand touch game.
"Oh, man, I've joined the blue club," Peterson told reporters after a recent scrimmage. "I've always made fun of the quarterbacks. Now, I've kind of joined the gang."