specifically LJ’s health. BYU is 5-0 basically without a consistent run game but I don’t think BYU can keep this up forever. It’s hard enough to go undefeated even when you are excellent on both sides of the ball.
BYU can probably lose once (maybe twice) and still make the Big XII championship game. But there will be games where I think if there is no solid running attack BYU will lose by multiple scores as opposed to keeping the game close and finding ways to win in the end. But it only happens if the run games steps it up a few notches which likely requires LJ to be healthy.