WBO/IBF junior lightweight world champion Mikaela Mayer, the Southern California native who is now one of the sport's top pound-for-pound talents, is ready for her home region title defense. (photos by Mikey Williams)

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Mayer will defend her belts against former featherweight world champion Jennifer Han on Saturday evening at the Orange County Fair & Event Center in Costa Mesa, California (ESPN, ESPN Deportes and ESPN+, 10 p.m. ET/7 p.m. PT).


At the press conference, it was announced that Mayer inked a multi-year contract extension with Top Rank. Mayer signed with Top Rank after representing the U.S. at the 2016 Rio Olympics.

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In the 10-round co-feature, welterweight contender and San Diego native Giovani Santillan will battle Jeovanis Barraza. The ESPN telecast will open with former world champion Andrew Moloney versus Gilberto Mendoza in an eight-round junior bantamweight tilt.

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The ESPN+-streamed undercard (7 p.m. ET/4 p.m. PT) features former two-time bantamweight title challenger Jason Moloney and the professional debut of U.S. Olympian Virginia Fuchs in a four-round flyweight fight.

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