Davis, who was taken to Birmingham for a medical checkup, is expected to have to have surgery to repair a broken bone in his toe that could sideline him for as much as a month and a half.
The speedy junior, who has moved between safety and tailback, has been a full-time running back since spring training. Projected as a fourth string tailback behind Brad Lester, Mario Fannin and Ben Tate coming into preseason practice, the play of Davis had been one of the highlights of two-a-days.
Tristan Davis has been productive in preseason drills.
Davis played in all 13 games last season at safety with two starts. He made eight solo tackles with five assists. He did get to carry the football as he averaged 27 yards per kickoff return. He was considered a likely kickoff returner again this year.
Playing tailback in 2005 after moving from defense in preseason, Davis ran the football 11 times for 209 yards and two touchdowns. He rushed for 162 of those yards on eight second half carries vs. the Kentucky Wildcats.