Former WBO heavyweight champion Ray Mercer, 15-years older and 50-pounds lighter than his opponent Tim Sylvia, needed just 10-seconds to knockout the 310-pound former UFC heavyweight champion on Saturday in the main event of Adrenaline III in Birmingham, Alabama. A video of the KO is available after the jump...

Former UFC heavyweight champion Tim Sylvia weighed in at an astonishing 310.6 pounds on Friday in Birmingham, Alabama for his Adrenaline III headliner against former boxing champion Ray Mercer, who tipped the scales over 50 pounds lighter at 256.6 pounds.

A scheduled boxing match between former UFC heavyweight champion Tim Sylvia and former boxing champion Ray Mercer that was to headline Adenaline III has been scrapped, with the pair of former champions now set to square off in an MMA-rules bout this Saturday in Birmingham, Alabama.

A women's superfight between Gina Carano and Cris Cyborg is likely to take place in Strikeforce in August, Scott Smith suffered a shattered hand in Saturday's loss, DREAM has announced their featherweight grand prix pairings, and more...