Fighting more aggressively than usual, Floyd “Money” Mayweather overcame a near knockdown in the second round Saturday night to dominate the rest of the way and win a lopsided 12-round decision over Sugar Shane Mosley in their welterweight showdown.

Boxing’s biggest box office draw remained undefeated in 41 fights, but not before giving his fans and his corner a scare when a right hand to the side of his head buckled his knees a minute into the second, and he had to grab Mosley to avoid going down. Mosley landed another right later in the round, but the rest of the night belonged to Mayweather.

Mayweather won every minute of every round after the second and the normally defensive-minded fighter kept after Mosley until the final bell in a masterful performance that earned him every dollar of his guaranteed $22.5 million payday.

Mayweather made Mosley look every bit his 38 years as he landed sharp punches to his head, dominating a fighter who had vowed to turn the bout into the fight of the decade. Mosley tried his best, but couldn’t match the speed of the 33-year-old Mayweather, who grew more comfortable with each passing round.

Mosley was a substitute for Manny Pacquiao, who was all but signed to meet Mayweather until a dispute over drug testing derailed the mega fight. Instead, Pacquiao beat Joshua Clottey on March 13 in Dallas and is campaigning for a seat in congress in his native Philippines.

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