Running back Carlos Hyde was not on the practice field Tuesday, the result of a right-shoulder injury he sustained in the 49ers' fifth consecutive loss Sunday at Buffalo.
Hyde instead worked out on a stationary bike in the weight room next to the practice field, and he did so with his right arm in a sling. He got hurt during the third quarter of the 45-16 loss, came back for a few snaps and finished with 14 carries for 52 yards.
If Hyde doesn't play Sunday against the Tampa Bay Buccaneers _ the 49ers have their bye the following weekend _ then the likely starter would be either Shaun Draughn or Mike Davis.
Davis served as Hyde's primary backup last game and failed to convert on third-and-1, fourth-and-1 runs. Davis has 10 carries for 18 yards this season, a 1.8-yard average that is just up from last year's mark of 1.7 yards per carry as a rookie.
Draughn started six games last season after Hyde fractured his left foot. Draughn has 26 carries for 55 yards this season.
