Undefeated Kazakh phenom Janibek “Qazaq Style” Alimkhanuly (13-0, 8 KOs) will defend his WBO middleweight world title against Canadian contender Steven Butler (32-3-1, 26 KOs) this Saturday at Stockton Arena. (0hotos by Mikey Williams)

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In the co-feature, Australian fan-favorite Jason “Mayhem” Moloney (25-2, 19 KOs) will face big-punching Filipino contender Vincent Astrolabio (18-3, 13 KOs) for the vacant WBO bantamweight world title.

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Janibek-Butler and Moloney-Astrolabio will be broadcast live on ESPN, ESPN Deportes and ESPN+ at 10 p.m. ET/7 p.m. PT.

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The ESPN+-streamed undercard (6:15 p.m ET/3:15 p.m. PT) includes Stockton-born lightweight Gabriel Flores Jr. (21-2, 7 KOs) and top featherweight contender Ruben Villa (19-1, 6 KOs) in separate eight-round bouts. Amado Fernando Vargas (6-0, 2 KOs), the undefeated son of former junior middleweight world champion Fernando Vargas, is also set to return in a four-rounder.

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