Boxing is an addiction.
In 2017, I boxed in front of a home crowd in Sheffield and became the WBA super-middleweight world champion. After four attempts I had finally fulfilled my childhood dream, and the experience was as great as I had always imagined it would be. It was without doubt the best moment of my career.
Fighting in a heavier weight class is a big achievement on its own.
I always thought I would be a boxing champion.
At the end of the day, that's just boxing - it's a different sport altogether. But when I finish fighting for the UFC, there are so many different options I have. Boxing is another option I could take.
I've never been the biggest boxing fan. If I know the guy I will watch him. But if it's two great fighters and I don't know either of them then I won't bother.
My main goal is Vitali Klitschko. I figure eight rounds, I nail him with a right hand, a left-right combination and it's a wrap.
It's boxing. It's about getting people interested. If I didn't say some stupid things from time to time, there wouldn't be that many people interested in me. But I let my fists do the talking when the bell rings.
One of my short films was about a boxer.
I've always boxed, I always taught boxing.
When I win, I send shock waves through the boxing world.
I first got into boxing when I was quite young. I was about 12 when I won my first boxing match.
I'm the best heavyweight outside the world champions, and let's not forget that.
I'm always down to fight a legend of the sport.
Boxing was the only career where I wouldn't have to start out at the bottom. I had a good resume.
If I hit the Klitschkos with the same shots I was hitting John Ruiz, both of them would go over.
I wanted to fight guys like Shane Moseley, Miguel Cotto, and Alvarez.
I was fighting at 125 pounds when I was 15 years old... then became a champion at 126 pounds at 25 years old.
Different days, I think about different victories. Ricky Hatton is one of those fights. I respect Ricky Hatton. He's a warrior. He's a hell of a warrior.
When I was younger, growing up in Pittsburgh, they had a 'Golden Gloves' program through the Boys and Girls Club. In Pittsburgh, New York, Philly, Washington, those areas, I would go and spar at competitions.
I always said the 155-pound belt's been in so many grubby hands, man.
I would love to fight Ricky Hatton.
I did a bit of boxing when younger. Once I was joined by Muhammad Ali as my co-commentator. I've got a picture of the two of us together ringside at the Albert Hall on my wall at home.
I've been in the ring with the Bronze Bomber, Deontay Wilder. I've tasted his power, and he's tasted mine.
I think it's fair to say I've always been a boxing fan.