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Whether Nick Foles or Matt Scott lines up for the first snap behind Arizona's offensive line at the Rose Bowl on Saturday, the 15th-ranked Wildcats already know their offense is likely to click.
UCLA is certain Richard Brehaut will be its quarterback, yet the Bruins have no idea what to expect from their popgun Pistol offense and a defense about to get another brutal Pac-10 test.
Arizona (6-1, 3-1 Pac-10) has kept Foles' health under wraps throughout the week leading up to arguably the least intimidating game left on its schedule. His sprained right knee kept him out of last week's win over Washington, but Scott scarcely made a mistake in his place.
''Matt is a bit more fiery kind of guy, Nick is kind of more collected,'' Arizona receiver David Douglas said. ''They're both great leaders, though.''
UCLA coach Rick Neuheisel doesn't expect any breaks from the Wildcats' purring offense no matter who's calling the shots.
''This Scott kid is certainly very athletic, as witnessed by his game against Washington,'' Neuheisel said. ''He's obviously very accurate. They give him a lot of time to throw, which is the mark of a good offensive line. We have to find ways to create pressure, but in so doing, you can't open up running lanes so he picks it up and is gone. You've got to pick your spot where you're going to come after him and hopefully get home.''
Neuheisel has plenty of his own problems.
After two straight blowout losses, UCLA (3-4, 1-3) has lost starting quarterback Kevin Prince for the season to knee surgery, leaving Brehaut to make his third career start in charge of the FBS's 117th-ranked passing offense.
Nobody knows what to make of the Bruins, not even their next opponent. UCLA is good enough to win at Texas and take down nationally ranked Houston on consecutive weekends last month, but the Bruins also are bad enough to be outscored 95-20 in their last two games.
''They've been up and down,'' Arizona offensive tackle Adam Grant said. ''We've been that way too this season. You don't know what's going to show up there. You just have to come prepared and play as hard as you can against them. They have great players.''
But they don't have Prince, who beat out Brehaut for the starting job before failing to stay healthy yet again. The Wildcats have special knowledge of the quarterback they'll face: Arizona recruited Brehaut, offering him a scholarship before he chose UCLA.
Arizona's defense is rounding into fine form, giving up 21 points in the last two games and allowing more than 20 twice all season. The Wildcats are seventh in the FBS in rushing defense, while UCLA's running game is ranked 22nd behind tailback Johnathan Franklin.
Brehaut realizes he's facing the Pac-10's sack leaders - Arizona defensive ends Ricky Elmore and Brooks Reed - without starting left tackle Sean Sheller protecting his blind side. Brehaut also knows that if he survives the rush, starting receiver Ricky Marvray won't be waiting for a pass: Marvray and Sheller are suspended for a game for an undisclosed violation of team rules.
It's enough to make any quarterback panic, but Brehaut is eager to see whether UCLA's run-based offense can keep up with Arizona's increasingly fine-tuned unit.
''They've got that great pass rush, and they love to disguise what they do with it,'' he said. ''You've got to make sure you've got your eyes up, watching everything that's coming from both sides. That's going to be a key to the game, seeing how well we can monitor their pressure.''
