Martin announced his plans Saturday on Twitter but didn't indicate any possible destinations. The former Alabama Mr. Football says signing with Auburn "was the opportunity of a lifetime."
Martin carried only 13 times for 57 yards this season. He played in five games, one too many to qualify for a redshirt year.
But in two of those games, the four-star recruit didn't log a carry, and in a third, he ran the ball only once.
The 5-foot-11, 209-pound Martin ran for 2,228 yards and 33 touchdowns as a high school senior.
Auburn quarterback Jarrett Stidham already had announced plans to skip his senior season and enter the NFL draft.