He attended Judson High School in Converse, Texas; upon graduating in 2009, he played football at Baylor University.
He eventually earned a tryout with the Houston Texans of the NFL, but failed to make the team.
[3] He recorded statistics in exactly one game for the SaberCats; there, he assisted on a sack in the team's regular season finale against the Los Angeles Kiss.
McAllister finished the season on the team's Injured Reserve list; despite this, he won his first AFL Championship when the SaberCats defeated the Jacksonville Sharks in ArenaBowl XXVIII.
[5] On July 8, the Rattlers defeated the Sioux Falls Storm in the United Bowl by a score of 50–41.