Strength coach Ariza doesn’t know anything about boxing, says Mayweather Sr.

Floyd Mayweather Sr., doesn’t care if he’s on your camp. If he doesn’t like you, he doesn’t like you.

Talking to OnTheRopesBoxing.com, the father and trainer of Floyd Mayweather Jr. lambasted strength and conditioning coach Alex Ariza, saying he doesn’t know anything.

“He don’t know sh*t anyways, he don’t know anything about no damn boxing, I do know that,” Mayweather Sr. said of Ariza.

Ariza is Manny Pacquiao’s former strength and conditioning coach before they split up following the eight-division World Champion’s two consecutive losses against Juan Manuel Marquez and Timothy Bradley.

Pacquiao now has Justin Fortune by his side in place of Ariza.

BACKSTORY: Justin Fortune says Mayweather can’t keep up with Pacquiao’s speed

“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 Jr. is not the first Pacquiao opponent that Ariza sided with.

Ariza became the strength and conditioning coach of Brandon Rios in 2013. Pacquiao won that fight convincingly.

Mayweather Sr. added that Ariza is not helping anybody and that he’s not doing what he’s supposed to do for his son.

“Strengthening him? That son of a b*tch ain’t strengthening nobody. He ain’t nobody,” Mayweather Sr. said.

Pacquiao and Mayweather will settle a beef that lasted for almost six years in a match between their era’s best fighters on May 2.

“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.”