(video by Ryan Burton) - Unified WBC, WBA and IBF World Champion Jermell Charlo and WBO World Champion Brian Castano battle for undisputed status at super welterweight as all four 154-pound belts hang in the balance for the first time in history on Saturday, July 17 live on SHOWTIME from AT&T Center in San Antonio in a Premier Boxing Champions event.

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SHOWTIME CHAMPIONSHIP BOXING begins at 9 p.m. ET/6 p.m. PT and will also feature unbeaten Interim WBA Lightweight Champion Rolando “Rolly” Romero taking on Austin Dulay in the co-main event, plus unbeaten middleweight Amilcar Vidal matching up against veteran contender Immanuwel Aleem in a 10-round bout that opens the telecast.

Tickets for the live event, which is promoted by Lions Only Promotions and TGB Promotions, are on sale now and can be purchased through www.attcenter.com. Romero vs. Dulay is co-promoted with Mayweather Promotions.