Morgan Fox was born and raised in Fountain, Colorado where he starred for Fountain-Fort Carson High School. He earned First-Team All-Conference, All-City, and All-State honors as a senior after recording 112 tackles, eight sacks, five fumble recoveries, and two forced fumbles. Fox also lettered in wrestling and lacrosse.
Fox chose to stay close to home to play for the Thunderwolves of Colorado State University Pueblo. It took little time for him to see the field as he recorded a pair of sacks and 10 tackles as a true freshman. As a full-time starter during his sophomore season, Fox recorded 45 tackles and six sacks to earn Second-Team All-RMAC honors.