Two people familiar with the results say Isaiah Crowell and two other Georgia tailbacks were suspended for Saturday's game against New Mexico State after failing drug tests administered last week.
The tests were administered on Wednesday night and the results were confirmed on Tuesday.
The people spoke to The Associated Press on Wednesday on condition of anonymity because Georgia does not release the results of the tests.
According to athletic association policy, student-athletes are suspended for 10 percent of their competitions for first-time violations of the drug tests.
Crowell, a freshman, leads Georgia with 689 yards rushing and four touchdowns. Tailbacks Ken Malcome and Carlton Thomas also were suspended on Tuesday for what was announced as violations of team policy.
ESPN first reported the failed drug test.