He is resting a strained oblique muscle that causes pain when he throws. For the first time acknowledged the possibility he could sit out the season opener Sept. 4 against Kansas State.
"If I can't make it against Kansas State then I'll just try to get back by Stanford," Prince said. "You can't rush it and be set back even further than we are right now. It's frustrating, but that's the way it goes."
Prince has been out for the better part of two weeks because of the injury. He is participating in team drills, but mostly on running plays. On Tuesday, he threw about a dozen passes during drills and said he felt pain. On Wednesday, he threw only two passes.
"We just wanted to see what I could do and we found out what we could do, but obviously we're not there yet," he said. "I'm not completely healthy yet."
He said limiting his throwing Wednesday after throwing Tuesday did not indicate a setback.
"We just wanted to make sure I could throw without taking a step backwards, which I think we did," he said.
Sophomore Richard Brehaut took most of the snaps with the first team Wednesday and coach Rick Neuheisel said Prince would sit out the scrimmage Friday.
"I think that we have to hope we can have Kevin back in some meaningful form starting on Monday," Neuheisel said. "Richard has got to be ready to go. He's had a great camp and he was outstanding in the scrimmage and I think can be great."
Peter Yoon is a freelance writer based in Los Angeles. Follow him on Twitter.