By Edward Chaykovsky

Floyd Mayweather Sr., father and trainer of WBC/WBA welterweight and junior middleweight champion Floyd Mayweather Jr., is not a big fan of strength and conditioning coach Alex Ariza.

Ariza had previously worked for several years with Manny Pacquiao until he was fired by trainer Freddie Roach in 2012. Mayweather will face Pacquiao on May 2nd at the MGM Grand in Las Vegas.

Ariza is working with Mayweather, helping with his current training camp. Mayweather Sr. disagrees with his worth in the gym.

"That son of a bitch ain’t strengthening nobody. He ain’t nobody. He’s in there, I can’t say exactly what he’s doing but he ain’t strength training little Floyd. What Floyd’s doing everybody’s helping, it’s not just one person," Mayweather Sr. told On The Ropes Boxing Radio .

Mayweather Sr. said Ariza is also of no help when it comes to insider information about Pacquiao himself.

"He don’t know sh*t anyways, he don’t anything about no damn boxing, I do know that. I know he doesn’t know anything about boxing and he don’t know what to tell anyone anyways. If he does know anything, it’s some dirty sh*t and it’s something that nobody wants to use or hear about. Nobody is into that kind of mess," Mayweather Sr. said.