Mayweather spars six rounds against Haney in prep for McGregor fight
Mayweather has begun sparring for his super fight with McGregor. He posed with young, up-and-coming prospect Devin Haney after taking the 18-year-old six rounds. Haney, who is 15-0 as a professional already and 22 years Mayweather’s junior, is preparing for his lightweight contest with Erick Daniel Martinez on June 24.