It stinks that LJ Martin is out but ARod knew last year that he struggled to stay healthy and they brought in no one to challenge for the position or replace him if necessary.
And this isn't the first time that BYU has been incredibly thin at RB under Kalani as they've had to move players from other positions to end the season. Granted that worked out really well with Allgeier but that isn't a winning long-term strategy.