What happened: A lower-body injury will sideline BYU running back LJ Martin, already ruled out for Friday's game against Iowa State, for four to six weeks. He exited the team's recent victory over TCU and did not return.

Why it matters: The absence removes a centerpiece of the rushing attack just as conference play intensifies. Head coach Kalani Sitake indicated the team will turn to a committee approach to fill the void.

What to watch: Quarterback Bear Bachmeier is expected to take a more active role in the ground game as the reshaped backfield navigates the upcoming schedule.