Georgia tailback Keith Marshall’s comeback from ACL surgery has been further slowed by knee and ankle sprains suffered in last week’s game against Troy.

Coach Mark Richt labeled Marshall “very doubtful” to play Saturday against Tennessee, but Richt said the junior tailback is holding up well through the latest setback.

“I think it’s been frustrating for Keith, obviously, but he’s a strong kid,” Richt said. “He is a man of faith, and he knows nothing is promised and that everything doesn’t always have to go his way. It’s not easy what he’s going through right now, but … he’ll be able to get through this thing fine, I think. It’s just going to take some time.”

Marshall suffered a torn ACL in his right knee in the fifth game of last season — at Tennessee — and underwent reconstructive surgery. Before spraining his right knee and right ankle in the fourth quarter against Troy last Saturday, Marshall had 14 yards rushing on five carries in the game. For the season, he has 24 yards rushing on 12 carries.