Spurrier says he made the decision after starting quarterback Tommy Beecher couldn't practice Monday because he couldn't lift his non-throwing shoulder.
But Spurrier concedes Smelley probably deserves to start even if Beecher was not injured.
Beecher threw four interceptions in his first career start last week against North Carolina State. The junior came out before the fourth quarter because he was hurt.
Smelley then completed all five of his passes and led the Gamecocks on three scoring drives.
Spurrier says freshman Stephen Garcia will likely be Smelley's backup unless Beecher's shoulder improves.
South Carolina quarterback Chris Smelley, right, will start for the Gamecocks Thursday against Vanderbilt. / photo: Associated Press
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