ORLANDO, FLORIDA (TICKER) —The best pound-for-pound fighter had a successful debut in the wrestling ring Sunday.

WBC welterweight champion Floyd Mayweather defeated the seven-foot, 441-pound Big Show at the Florida Citrus Bowl by virtue of a knockout at WrestleMania XXIV.

At 5-8, 159 pounds, “Money” Mayweather overcame nearly a 300-pound disadvantage, courtesy of his right hand and some dubious tactics.

After attempting to play cat-and-mouse with the Big Show for much of the match, Mayweather found himself in trouble when the “world’s largest athlete” wrapped his hands around the boxer’s neck.

But Mayweather countered with a kick to the giant’s groin and - due to the stipulation that “anything goes” - repeatedly hit the Big Show in the head with a steel chair.

The six-time champion then finished off his opponent by putting brass knuckles on his right hand and delivering one big punch to the jaw.

After the Big Show went down, the referee ruled him out at the count of 10, setting off a celebration from Mayweather and drawing loud boos from the 74,635 in attendance.