Add Yahoo as a preferred source to see more of our stories on Google. LAS VEGAS, NV - NOVEMBER 30: Stephan Bonnar arrives at the 2011 Fighters Only World Mixed Martial Arts Awards on November 30, 2011 ...

The MMA world has taken a hit. UFC Hall of Famer Stephan Bonnar died Dec. 22 at age 45. According to the organization, his cause of death is from presumed heart complications while he was at work.

Stephan Bonnar died from "presumed heart complications while at work," the UFC said in a news release on Saturday Stephan Bonnar, a professional wrestler and Ultimate Fighting Championship (UFC) Hall ...