Boxing: Floyd Mayweather pays touching tribute to his uncle, trainer Roger who died, aged 58

American boxer Floyd Mayweather has paid tribute to uncle Roger, after his death at the age of 58.

Roger Mayweather, who won world titles at super featherweight and super lightweight, while winning 59 of his 72 professional fights, passed away on Wednesday (NZ time), after years of ill health.

He also played a pivotal role in Floyd Mayweather's career, guiding his nephew to 34 of his 50 wins, including triumphs over Ricky Hatton and Oscar de la Hoya.

"My uncle was one of the most important people in my life, inside and outside of the ring," said Floyd.

"Roger was a great champion and one of the best trainers in boxing.

"Unfortunately, his health was failing him for several years and now he can finally rest in peace. 

"Roger meant the world to me... my father Floyd Sr, my uncle Jeff, everyone in and around the Mayweather Boxing Gym and the entire boxing world.

"It is a terrible loss for all of us. We are thankful for all the love and well wishes we have already received, as word travelled about Roger’s passing.

"It helps me to see that he was able to touch so many people through his life in boxing, because he gave so much to the sport, which was his first and longtime love." 

Roger Mayweather's death is the latest blow for Floyd, who is still reeling from the passing of his ex-girlfriend and mother of three of his children, Josie Harris.

Harris was found dead at her home in California last week, aged 40.

Floyd has since posted a series of tributes to his former partner on social media accounts.