They switched the match from Boxing to MMA.

According to these sites Mercer knocked Sylvia out in 10 seconds


Live coverage of Adrenaline 3 “Sylvia vs. Mercer Bragging rights in Birmingham” | Next MMA Fighter

Adrenaline MMA III Results: - John Salter > Roberto Traven (KO 1st round, 2:15) - Rich Clementi... - Bloody Elbow