Brown attended Brenham High School in Brenham, Texas, where he was a three-sport athlete in football, basketball and track. A three-year starter, he recorded 125 tackles and 24 sacks during his high school football career. He also threw the shot put (top-throw of 48-8 or 14.91 meters) on the track team. Brown was regarded as a five-star recruit by Rivals.com and was ranked as the fifth-best defensive tackle and the 26th-best player overall in his class.
