LAS VEGAS >> Canelo Alvarez proved nothing more than easy money for Floyd Mayweather Jr.

Mayweather turned one of the richest fights ever into just another $41.5 million payday Saturday, dominating Alvarez from the opening bell and winning a majority decision in a masterful performance that left no doubt who is the best fighter of his era.

Fighting off his shortest layoff in years, Mayweather was sharp, efficient and sometimes brutal in dismantling an unbeaten fighter who was bigger and was supposed to punch harder. He frustrated Alvarez early, pounded him with big right hands in the middle rounds, and made him look just like he said he would — like any other opponent.

Mayweather was favored 117-111 and 116-112 on two ringside scorecards while a third inexplicably had the fight 114-114. The Associated Press scored it 119-109 for Mayweather.

"I just listened to my corner, listened to my dad," Mayweather said. "My dad had a brilliant game plan, and I went out there and got the job done."

Mayweather remained unbeaten in 45 fights and added another piece of the junior middleweight title to his collection in a fight that was fought at a 152-pound limit. Alvarez weighed in at that weight, but was an unofficial 165 pounds when he got into the ring while Mayweather, who weighed in at 1501/2 pounds, was an even 150.

The extra weight did Alvarez no good and the punching power that brought him 30 knockouts in 43 fights wasn’t a help either. The Mexican star was seldom able to land a solid punch, with most of his punches either missing or glancing off Mayweather.

"No doubt he’s a great fighter, a very intelligent fighter," said Alvarez, who fell to 42-1-1. "There was no solution for him."

Mayweather said he actually had to put on weight during the day to even get close to what he weighed the day before.

"When I woke up this morning, I was 146 pounds, so I had to call my chef and get something in my system," he said.

Mayweather’s speed was the difference all night as he was able to land straight rights and left jabs, then get out of the way before Alvarez was able to respond. But while Mayweather used great defense, he wasn’t afraid to attack often and at different angles, finding Alvarez with punches he couldn’t anticipate.

When it was over, Mayweather didn’t even celebrate, walking over to a corner to look at the crowd. Just another payday, just another win for Money May. The only surprise came when it was announced the decision wasn’t unanimous, with judge C.J. Ross scoring it even.

Ringside punch stats showed Mayweather dominance, crediting him with landing 232 of 505 punches to 117 of 526 for Alvarez.