7. Ray Mercer Knocks Out Tim Sylvia
You know how everyone is saying Floyd Mayweather doesn’t stand a chance in MMA? He would if he faced Tim Sylvia.
Sylvia was never known for his ground game or grappling ability, so he made a fairly easy MMA debut fight for champion boxer, Ray Mercer.
On June 13th, 2009 Mercer needed just 9 seconds to KO the former UFC Heavyweight Champion.
