It's unclear who will start Saturday against Kansas State in the Rose Bowl. True freshman Richard Brehaut is officially listed as Prince's backup, but senior Kevin Craft was the Bruins starter in 2008 and is far more experienced.
Craft also led the Bruins to a victory over Tennessee and guided a clutch, game-winning drive in a win over Stanford. On the down side, he threw a school-record 20 interceptions and the Bruins finished 4-8 last season.
Prince, a redshirt freshman, led the Bruins to a 19-15 victory Saturday at Tennessee, completing 11 of 23 passes for 101 yards with a touchdown and no interceptions.
He was injured when he was tackled for a safety late in the game. He played the final two snaps, kneeling on the football both times.
X-rays on Sunday revealed the fracture, which will require his jaw to be wired shut.
"This is a tough blow for Kevin and our football team," UCLA coach Rick Neuheisel said in a statement. "We hope Kevin recovers quickly, but we have other talented quarterbacks in our program. We have confidence in all of our quarterbacks and we will get them read to lead us against Kansas State."
Ted Miller covers Pac-10 football for ESPN.com