UFC 109 main card recap: Couture subs Coleman, Sonnen grinds out Marquardt

Submitted by mmajunkie on 2-7-10

LAS VEGAS - An ex-champ-vs.-ex-champ, all-UFC-of-Famer main event that was 11 years in the making lasted just six minutes as Randy Couture topped fellow MMA trailblazer Mark Coleman via second-round stoppage at Saturday's "UFC 109: Relentless" event.