In 1994, Severn started competing in the Ultimate Fighting Championships (UFC). In his first fight at UFC 4, he surprised many UFC fans by executing two impressive back suplexes on Anthony Macias. In the finals, Severn was defeated by Royce Gracie who secured a triangle choke for the victory. The submission loss came after Severn avoided Gracie's submission efforts for 15 minutes, the longest UFC fight up until that time. He was the first world-class wrestler to enter the UFC, foreshadowing the period of dominance by wrestlers such as Don Frye in UFC 8 and 9 and Mark Coleman in UFC 10 and 11.