Floyd Mayweather’s four-year-old grandson has already begun boxing training. Kentrall Gaulden Jr, known as KJ, is the son of Mayweather’s eldest daughter, Iyanna, and rapper NBA YoungBoy, whose real name is Kentrell DeSean Gaulden.
KJ carries boxing greatness in his DNA as the grandson of the undefeated 50-0 champion. Mayweather’s father and uncles also fought professionally, building a family legacy rooted in the sport.
That legacy now continues as Mayweather personally trains KJ, who turned four in January.
Training Under the Champ’s Watchful Eye
Iyanna Mayweather has shared multiple clips of KJ training inside her father’s iconic Las Vegas gym. The young boy learns directly under the guidance of the undefeated legend himself.
Iyanna holds high hopes for her son’s boxing future. She posted a picture of KJ captioned: “My baby practising how he’s going to climb the ropes after he wins his fights.”
Mayweather, who retired after defeating UFC star Conor McGregor in their 2017 crossover bout, continues to stay active through exhibition fights. His next exhibition will come against Mike Tyson in 2026.
Family Fame Extends Beyond the Ring
Both Mayweather and Tyson have signed for the 2026 bout, though the date and venue remain unconfirmed.
Iyanna, now 25, gave birth to KJ in January 2021 with her former partner, NBA YoungBoy.
The rapper, reportedly a father to 12 children with ten different women, returned to the public eye after his house arrest release in April. Authorities charged him in 2021 with a firearm-related offense.
Since his release, NBA YoungBoy has resumed making music and preparing for a new tour, while his young son begins his own journey — inside the boxing ring.
