The five-star prospect is ranked by Scout.com as the fourth-best running back in the nation, and the 16th-best overall prospect.
Sims led Abilene to a 15-0 record and the Class 5A Division II state championship in 2009, setting school records with 2,260 rushing yards and 32 touchdowns on just 250 carries (an average of nine yards per attempt). He also caught 23 passes for 371 yards and four TDs.
Sims confirmed his commitment in a text to GoPokes.com around 12:30 p.m. Thursday.
Click below to watch video of Sims: