Let's dismiss this one out of hand.
This Bleacher Report scorecard had it 115-113 for Mayweather by fight's end, and that was echoed by Dan Rafael of ESPN.com with the same score and Lyle Fitzsimmons of Bleacher Report and CBS Sports, who had the contest 116-112 for Mayweather.
Give Maidana a ton of credit. He, along with trainer Robert Garcia, came in there with a game plan, and they executed it to the best of their ability. He gave Mayweather some of the roughest rounds we've seen him in since, well, ever really, and even seemed to have the pound-for-pound king a little nervous midway through the fight.
But Mayweather, as he has made a career out of doing, eventually did figure out his man. It was a brutal dogfight, for sure, and perhaps the toughest night of his 46-fight reign. He was cut over the right eye—the first such incident of his career—by a headbutt which affected his vision, and nothing he did could discourage the Argentine from pressing forward.
Mayweather popped dozens of lead right's and short left hooks off his opponent's skull, particularly in the second half of the fight as Chino slowed down a bit and Floyd figured out his avenue of attack, but his foe kept coming.
By the end of the night, Mayweather was credited with a 230-221 advantage in landed shots, despite Maidana throwing more than 400 more punches than Mayweather. For all his Tasmanian Devil-esque activity, Maidana wasn't very accurate. His murderous shots, rough infighting and unwillingness to let up put Mayweather in some precarious spots, yes, but he missed over 600 punches.
Meanwhile, Mayweather, who was far more economical, connected at a 54 percent clip for the fight. He did a lot of making Maidana miss and making him pay.
You can't score fights based on expectations or on how surprised you are by a fighter exceeding those expectations.
Was Mayweather in a really, really tough fight? Yes.
Were there more than a few nervous moments? Absolutely.
Did Maidana massively exceed expectations? Beyond a doubt.
But just because Mayweather didn't win in the dominant fashion we all expected, and make Maidana look like a club fighter in the process, doesn't mean he didn't win.
He did. Not being dominant and losing are completely different things.