By Mark Vester

"Sugar" Shane Mosley took a few shots at Floyd Mayweather Jr. for not accepting a fight with WBO welterweight champion Manny Pacquiao. Mosley faces Pacquiao on May 7 at the MGM Grand in Las Vegas. He feels like he's doing Mayweather's "dirty work" by fighting Pacquiao in May.

"I don't know what to make of Floyd not fighting this fight. It's mind-boggling to me," said Mosley to the AP. "It's like I said on Twitter, it feels like I'm doing Floyd's dirty work."

Mosley believes at least pary of the reason why the fight has not happened is Mayweather's past troubles with southpaw fighters. And there are also the ongoing legal issues. Mayweather is accused of felony grand larceny, coercion and robbery from an incident last September, and also faces misdemeanor domestic battery and harassment charges.