IMO, Mayweather should have had the unanimous decision until he coasted in the 12th.

By Mike Sloan and Victor Perea at ringside
WBC welterweight champion Floyd Mayweather Jr (38-0, 24 KOs) won a twelve round split decision over WBC super welterweight champion Oscar De La Hoya (38-5, 30 KOs) on Saturday night at the MGM Grand Garden Arena in Las Vegas. Floyd had the edge in a slow round one, but De La Hoya upped the pressure to win round two. After an opening flurry in round three, Oscar wasn't as aggressive and Floyd picked him apart. De La Hoya landed about a dozen body shots in succession while Floyd was on the ropes in round four. Both fighters scored in round five, with Floyd getting the better of it. Oscar connected well in round six, plus showed some defensive skills making Floyd miss wildly several times. Oscar effectively used his jab and outworked Floyd in the seventh. Oscar flurried at the end of the eighth to possibly steal a close round. Mayweather dominated landed the most meaningful punches in the ninth and tenth, as Oscar grew fatigued. Floyd mostly dominated the eleventh, but Oscar landed the best punch of the round. Both fighters traded punches to end the fight. Scores were 116-112, 115-113 Mayweather, 115-113 De La Hoya.