Janibek Alimkhanuly versus Steven Butler set for May 13

Tickets are on sale now for the May 13 championship doubleheader featuring undefeated Kazak phenom Janikbek “Qazaq Style” Alimkhanuly defending his WBO middleweight world title in the main event against Canadian contender Steven Butler at Stockton Arena in Stockton, California.

In the co-feature, Australian fan-favorite Jason “Mayhem” Moloney will face big-punching Filipino contender Vincent Astrolabio for the vacant WBO bantamweight world 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.

Promoted by Top Rank, in association with Eye of the Tiger, tickets starting at $25 are on sale now at Ticketmaster.com.

The ESPN+-streamed undercard will feature the return of “Stockton’s King,” Gabriel Flores Jr., in an eight-round lightweight battle.

Brazilian Olympic Gold medalist and former two-time title challenger Robson Conceicao joins the undercard action in a 10-round junior lightweight bout. Conceicao (17-2, 8 KOs) will see action for the first time since dropping a decision loss to Shakur Stevenson last September. His only other loss came against former two-division champion Oscar Valdez.

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