6 WWE Superstars you didn't know also competed in MMA 

#5 Sean O'Haire

O'Haire would have greater success in WCW than WWE, becoming a three-time Tag Team Champion

Sean O’Haire was a pro wrestling prospect whose career fell a bit short of expectations. The former Wrestling Observer “Rookie of the Year” (in 2000) O'Haire is best remembered for his stint in WCW, where he became a 3-time WCW Tag Team Champion, and his time in WWE, where he worked alongside Roddy Piper in 2003.

After retiring from wrestling back in 2006, O’Haire went on to compete professionally in both mixed martial arts and kickboxing. As an MMA fighter, he had a total of 6 professional fights and a solid 4-2 record. His most high-profile fight took place in October of 2006 when we took on former boxing star Butterbean.

Wrestling fans may recall Butterbean's sole appearance in the industry at WrestleMania 15, where he knocked out Brawl For All winner Bart Gunn, and though O'Haire was hoping for a different outcome, he fared even worse. The contest took place at Pride 32 and ended with Butterbean knocking out the former wrestler in just 29 seconds, six seconds less than it took the heavyweight to knock out Gunn back in 1999.