After the first scrimmage of the fall Saturday afternoon at Bryant-Denny Stadium, coach Nick Saban updated the growing injury list.
Saban said Saturday the injury will require surgery.
Alabama insider Matt Zenitz revealed Sanders suffered the injury on the final play of the team's practice on Thursday.
"Trey Sanders is doing really, really well in camp", Saban said last week.
Sanders was expected to play a pretty large role in Alabama's offense this coming season, seeing that he was the nation's No. 1 running back coming out of IMG Academy this past recruiting cycle. The Crimson Tide also brought in ESPN 300 running back Keilan Robinson of Washington, D.C., in this signing class. "We've got some guys that have experience that are probably a lot closer to being game-ready than others, and we have a lot of other guys that we need to really work hard with so that we develop a lot of depth on our team". He's learning every day.
Junior Najee Harris is expected to carry the bulk of the load for Alabama this season, though the 6-foot, 214-pound Sanders was expected to push him for carries. Josh Jacobs and Damien Harris are both now in the National Football League after being drafted in the first and third rounds, respectively, earlier this year. As of now, Brian Robinson looks to be Harris' top backup.