Bradford warming up, but is something awry?

Posted by ESPN.com's Tim Griffin

NORMAN, Okla. -- Sam Bradford is out on the field in his crimson No. 14 Oklahoma uniform.

But a couple of things struck me as strange as he was warming up with his offense.

First, I noticed that Bradford would take the snap from center, back up several steps and stop. I haven't seen him thrown a pass in about 15 minutes.

Also, I couldn't help but see that Bradford was taking snaps from Oklahoma's No. 2 center Brian Lepak. Landry Jones was working with Ben Habern, who is Oklahoma's starting center.

I wonder if Bob Stoops has got something up his sleeve?