Related Articles: Sugar Shane and Money Mayweather Speak on Their Upcoming Fight

To hear him tell it, Floyd Mayweather hasn't had a serious contender in his perfect, no loss, career, while Shane has sought out boxing's best competitors, and come May 1st, Floyd will be facing one of the best pound-for-pound boxers in the sport's history.

In the same way Floyd Sr. plays a vital role in Mayweather's life, Jack Mosley is the force behind much of his son's success, having trained him since he was 8 years old.

Of course, Shane has fired his father as his professional trainer twice during his career, citing that his father was distracted by other things besides boxing. Still, in 1998, father and son were honored as fighter and trainer of the year, respectively.

It's always difficult, because that's your blood and I trained him since age 8. I guess some fathers would be mad and don't want to speak to nobody, but that's not me. God said forgive those, they know not what they do. I am a God-fearing person, so I'm not going to hold anything against my son.

Did you ever have a moment when you wanted him to retire?

Well, he's in good shape right now, but I always look at him and check whether anything [is] wrong, I know. I'm sure he'll retire pretty soon, because soon after awhile you've accomplished everything you can and you've made all the money in the world. He's promoting fights with Oscar de la Hoya, which is a good thing that's a future thing. One day I might be promoting too.

I produced a champion from scratch. I don't know anyone who has done that. Shane has won several world titles, three time national champion, No. 1 four years in a row as an amateur - I did this, no one else has done that.

Would you say that Floyd Sr. would say the same thing?

No, you heard what he said. His son said the same thing, he's the best fighter in the world, he's better than Sugar Ray Robinson, better than Muhammad Ali. Well, Sugar Ray Robinson had 160 something fights, this guy hasn't even come close to that, how can he say that? Ali used to say he was the best heavyweight in the world, he never said he was the best fighter in the world.

He'll give Floyd all the hell he needs, those fighters he fought they ain't s---. Shane would have knocked them out in one round.

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When did you know you had a future champion on your hands, at what age?

He beat an open fighter, his first fighter, and won the tournament. Beat up kids three years advanced on him. First time out. He was training at 8 years old.

He wanted to box 'cause I was going to the gym and losing weight and he started coming to the gym with me. His mother wanted him to come to the gym with me 'cause he was too hyper. We had to leave a tricycle or big wheel at the nursery school, because he couldn't go to sleep, he was too hyper. He got to ride the big wheel around while everyone slept. Just too much energy. His mother didn't care for the boxing, she went to one amateur show and that was it for her. She hasn't been back since.

I was an amateur fighter, only difference is that one gets money. I have the talent, skills. I can transfer that to him. Everyone knew where Shane was and where I was, we're at the gym, so in that way I thought it was a good thing, because I could keep my son away from all the gang members. I was like y'all can come to the gym, but Shane doesn't have time to hang around like that. They encouraged Shane to keep boxing and not to hang out. I was raised in Watts, and when my son was born, we moved to Pomona. They had gangs in Pomona. They were young gangstas, wanna-be's. One of the fighters I trained with Shane, a little gang member, he's in jail right now, been in there 15 years. Got out and went right back. The game is for making money, not for knocking people out in the street. As an amateur, Shane was beating up a lot of the pros, 15 years old boxing and sparring with the pros, who were 21 years old.

No, not really. That's all the media wants to hear. I tell Shane, don't even talk about nobody when you beat them up, they hurt enough when they lose. I told him don't do that, so he never has.

As a youngster, I always told Shane, I told him one day you will retire from the limelight so find something else to do because this stuff is short-lived, when it's gone, it's gone.

He has done that. He's promoting with Oscar de la Hoya, so losing the limelight is not going to affect Shane. Some fighters don't know what to do when it's over. They go crazy, start getting on drugs.

He's got determination and heart. He's been in boxing for 30 years. He's always been in great shape, never had any bad habits, drinking, smoking, dope or things like that. If he's not training, he's bowling or snowboarding, skating, roller skating, sensible kind of fun, play with his kids. He trains his older son, Shane Jr.

I think Floyd is one dimensional, what he does, he does well, but he has to give a lot more than what he's been giving. Basically, people he's fought have been small people or people over the hill, weak-damaged goods, like Diego Corrales. I understand he had to come down from 175 to 130. Well, he's dehydrdated. Yeah, you can knock him down!

He's fast enough to hit Floyd, and Floyd ain't fast enough to get out of the way. Floyd has never been hit hard. When you hit Floyd, he's gonna run. Shane is not gonna run, he's a warrior.

Shane has been trained to visualize the win. He has visualized himself beating Floyd for like 9 years now. When you visualize beating someone up, you watch the tapes, you know how he fights.

He's trying every way to get in Shane's head, talking about his family. Shane don't care, he's not touching him mentally.

Watch Jack's son talk about his love for basketball here: