Catalon grew up in Mansfield, Texas and attended Mansfield Legacy High School, where he played baseball, basketball, and football.[1] As a sophomore, he recorded 183 total tackles with seven tackles for loss and nine interceptions.[2] Catalon was named the All-Area Defensive Player of the Year by The Dallas Morning News as a junior after recording 101 tackles, three interceptions, six forced fumbles and five fumble recoveries.[3] He also started at quarterback and passed for 1,122 yards and 15 touchdowns with 1,064 yards and 13 touchdowns rushing ad Mansfield Legacy advanced to the 5A Division II state semifinals.[4] Catalon suffered a season-ending knee injury in the first game of his senior season.[5] Catalon was rated a four-star recruit and committed to play college football at Arkansas over offers from Oklahoma, TCU and Texas.[6]