Stanfill played defensive tackle for the Georgia Bulldogs from 1966 through 1968. He was awarded the Outland Trophy in 1968 and was named an All-American the same year. He received a B.S. degree from the University of Georgia in 1971. Stanfill was voted All-SEC in 1966, 1967 and 1968 and was the SEC Lineman of The Year in 1968. In addition, he was an Academic All-America that same season. During his three seasons at Georgia, the Bulldogs had a 26-6-2 record along with two Southeastern Conference titles: one in 1966 (co-champions) and the other in 1968. During that time the Bulldogs also appeared in three bowl games: the Cotton Bowl Classic in 1966, the Liberty Bowl in 1967 and the Sugar Bowl in 1968. Georgia beat SMU in the Cotton Bowl Classic, lost to North Carolina State in the Liberty and lost to the Arkansas Razorbacks in the Sugar.