By Edward Chaykovsky

Last month, former five division world champion Floyd Mayweather Jr. (49-0, 26 KOs) turned 40 years old.

The one-time pound-for-pound king retired from the sport in September 2015, after winning an easy twelve round decision over Andre Berto.

Despite his retirement, Mayweather continues to call for a cross-sports boxing match with UFC superstar Conor McGregor.

Floyd's father and head trainer, Floyd Mayweather Sr., has been very vocal in the past on the subject of a fight with McGregor.

While his son continues to hype the potential clash as a competitive fight, Mayweather Sr. - like most people - predicts a complete wipeout.

The elder Mayweather has been thinking things over as of late, and he thinks the fight with McGregor might be a risky proposition.  

A few weeks back, veteran trainer and boxing analyst Teddy Atlas made a prediction that McGregor - at some point during the fight - would violate the traditional rules of boxing and attack Mayweather with MMA moves - like elbows, a submission move or a knee to the face.   

Mayweather Sr. is starting to agree with Atlas. He also believes that McGregor may get frustrated during the contest and resort to an illegal tactic.

He believes his son doesn't need to take these kinds of risks at 40.

"When his age comes, he’s just got one thing he has to do, you have to deal with your age. He’s still talking about fighting, which I don’t think is a bad thing if he was fighting Conor McGregor. I think he’s quite a bit young too, Floyd’s over a decade older than him," Mayweather Sr. told On The Ropes Boxing Radio.

"You can’t be safe if you’re taking chances. I think he doesn’t need to be taking chances with nobody. If I was him, I may not do it with Conor McGregor. You never know what people may do, he may throw an elbow, he might throw a knee. You just don’t know with him.

"I’ve been thinking about this situation because I don’t think this is something that Floyd should attack right now, I don’t think he needs that right now."