By Edward Chaykovsky

Roger Mayweather, uncle and co-trainer of WBC/WBO/WBA welterweight champion Floyd Mayweather Jr., has taken some direct shots at his brother [and father of Floyd], Floyd Mayweather Sr.

As previously reported, Roger says his nephew was struggling a bit in most recent training camp because both of his hands were hurting him.

Mayweather has a very long history of dealing with hand problems. He would often receive injections in his hands to deal with the pain.

Roger revealed the information due to the current spotlight being shined on Manny Pacquiao's right shoulder injury. 

Mayweather won a twelve round unanimous decision over Pacquiao on May 2nd from the MGM Grand in Las Vegas.  After the match he disclosed that he suffered a right shoulder injury a month before the contest and then further injured himself during the fight. Pacquiao had surgery last Wednesday.

Also after the match, Mayweather revealed that he too entered the contest with several injuries, but he didn't want to complain about them when asked for details by reporters.

Roger had trained his nephew and worked the corner for several yeas, but was forced to step aside, due to health reasons, from working the Pacquiao fight.

But he says that even though he stepped aside from working the corner, he was the one who trained his nephew during training camp.

During the contest, Floyd Sr. was giving his son hell in the corner for not throwing enough. Roger says Floyd Sr. was unaware of the hand issue because he wasn't the one who worked the camp.

"Floyd [Sr.] don’t even train Floyd, so it don’t make no difference about what he says. Don’t mean sh*t about what he said. Floyd don’t train Floyd, and he didn’t even know Floyd’s hand was hurting. I knew Floyd’s hands were hurting because I train Floyd every day. What does he know? He don’t know nothing. Floyd’s hands were hurting every day, but he fought him anyways," Roger told On The Ropes Boxing Radio.

Roger and Floyd Sr. have often traded barbs in the past over which of them was the force behind Floyd Jr.'s success, and also over which of them was the actual head trainer.