Gone in ten seconds. That’s how long it took 48 year old former heavyweight boxing champion Ray Mercer to completely and utterly embarrass former UFC champion Tim Sylvia in Birmingham, Alabama.

The fight was the headlining bout at Adrenaline III: Bragging Rights at the Birmingham Jefferson Civic Center.

Previously scheduled to be a boxing match between a former UFC champion and an aging former boxing champion, the bout was unable to be sanctioned as a boxing contest and was switched to MMA rules at the last moment.

Mercer was able to capitalize on a missed Sylvia kick to set up the fight ending right hand to the chin and it was lights out for “The Maine-iac” just ten seconds into the contest.

Mercer was 0-1 in amateur MMA going into the bout with Sylvia. He had one submission loss to Kimbo Slice prior to last night’s bout.

Sylvia, who came into the fight around the 310 pound mark, has been finished in his last three straight bouts, and has lost four of his last five. He is scheduled to face off with Paul Buentello at Affliction III on August . There is no news yet if Sylvia may fall under a medical suspension that could prevent him from taking place in that bout.