FAYETTEVILLE -- Alex Collins and Kody Walker are listed as co-No. 1 at tailback for Arkansas heading into Saturday's game against Tennessee-Martin.
Collins, a two-time 1,000-yard rusher, has five 100-yard performances this season, but he also arrived late for the pre-game breakfast on Saturday and had two fumbles while rushing for 105 yards in Arkansas' 54-46 victory over Auburn.
The fumbles were recovered by teammates Hunter Henry and Brandon Allen, but running backs coach Jemal Singleton wasn't pleased, especially as Allen got hit on the ground on his recovery.
"Two fumbles is unacceptable," Singleton said. "We can't win with that.