The former boxing champ is now a health expert.
The boxer doesn't think the UFC star should be considered an all-time great.
Professional athletes are warning children about the risk of zeroing in on one sport too young.
The undefeated women's boxing champ, and daughter of Muhammad Ali, does not believe the UFC megastar is ready to crossover to boxing without taking time to train.
ESPN Launches Sports Humanitarian Awards
Athletes Offer Cookout Tips, Preferences
The iconic boxer receives a lifetime achievement award from the Harold & Carole Pump Foundation for his efforts in raising money to knock out this dreaded disease.
Women Sports Stars Talk Body Image, Confidence