Clowney was resting bone spurs in his right foot while Davis is dealing with an ankle injury. Gamecocks coach Steve Spurrier said earlier that backup tailback Shon Carson was likely to start against Football Championship Subdivision opponent Coastal Carolina on Saturday.
Clowney aggravated the foot problems in last week's 19-14 victory over Florida. He has said he'll have surgery after the season to alleviate the pain. After Coastal Carolina, the Gamecocks host rival Clemson.