During his freshman season, Johnson played in three games, rushing for 17 yards on three carries.

Johnson had a breakthrough in the 2007 season, finishing with 673 rushing yards and five touchdowns.
He ran for 122 yards and a touchdown in 14 carries against Washington before suffering a foot injury.
The injury, which was first diagnosed a game earlier as a left foot bruise, included a sprain that kept him out of practices and limited his playing time for the rest of the season.
He returned at the end of the season, rushing for 104 yards in the Rose Bowl.

As a junior in 2008, Johnson led the Trojans in rushing yards with 705 yards on 138 carries and nine touchdowns.
He had 305 yards on 42 punt returns.
During his freshman season, Johnson played in three games, rushing for 17 yards on three carries.
Johnson had a breakthrough in the 2007 season, finishing with 673 rushing yards and five touchdowns. He ran for 122 yards and a touchdown in 14 carries against Washington before suffering a foot injury. The injury, which was first diagnosed a game earlier as a left foot bruise, included a sprain that kept him out of practices and limited his playing time for the rest of the season. He returned at the end of the season, rushing for 104 yards in the Rose Bowl.
As a junior in 2008, Johnson led the Trojans in rushing yards with 705 yards on 138 carries and nine touchdowns. He had 305 yards on 42 punt returns.
Stafon Johnson