Look back #onthisday when #floydmayweather took on Jose Luis Castillo. It went on to be one of Mayweather's closest fights as he won by decision. Next Up for Top Rank Boxing, Undefeated Kazak phenom Janikbek “Qazaq Style” Alimkhanuly will defend his WBO middleweight world title in the main event against Canadian contender Steven Butler on Saturday, May 13, at Stockton Arena in Stockton, California. In the co-feature, former two-time world title challenger Jason “Mayhem” Moloney will face big-punching Filipino contender Vincent Astrolabio for the vacant WBO bantamweight title. Alimkhanuly-Butler and Moloney-Astrolabio will be broadcast live on ESPN, ESPN Deportes and ESPN+ at 10 p.m. ET/7 p.m. PT. Try ESPN+ For Free: https://watch.espnplus.com/toprank/ Subscribe to our YouTube channel to get notified about the latest highlights, free full fights, and fight week content as it's posted. Follow Top Rank on Twitter: http://www.twitter.com/trboxing Follow Top Rank on Instagram: htt