By Dan Ambrose: WBA light middleweight champion Miguel Cotto’s Cuban trainer Pedro Diaz has reportedly arrived in Puerto Rico to start getting the 31-year-old Cotto ready for his May 5th fight against unbeaten Floyd Mayweather Jr. at the MGM Grand in Las Vegas, Nevada.

Diaz was a big help to Cotto in his last fight against Antonio Margarito, giving him the boxing skills needed to keep from getting hammered into the canvas like Cotto had been the first time he fought Margarito. No doubt it helped that Margarito was coming off of three serious operations at the time that Cotto fought him last December. But Diaz did seem to help Cotto improve on the other changes that previous trainer Emanuel Steward had made in Cotto’s game.

Cotto will now start the beginning stages of trying to get in the best shape possible for the Mayweather fight. Cotto has to get in excellent shape because he’s got a nasty habit of running completely out of gas by the 8th round and taking a pounding in the last four rounds. We saw that against Manny Pacquiao, Joshua Clottey, Shane Mosley and Antonio Margarito. Cotto may not last that long, though, because Mayweather is going to be lancing his fast with shots all night long and I have a funny feeling that patchwork of scar tissue around both of Cotto’s eyes will quickly tear apart like tissue paper once Mayweather has landed 50-100 shots to the head.

The scar tissue is just too delicate and/or Cotto’s skin is just too paper thin for him to get hit without it ripping to pieces. Cotto will likely have the weight advantage in this fight but it will be meaningless weight if Mayweather is able to land his quicker shots. Cotto probably has little more than a puncher’s chance in this fight and that’s being kind. He’s really out of his class in this fight and is probably going to be taking some knees at some point in the fight.