“Knockout Kings,” headlined by Canelo Alvarez defending his WBC Super Welterweight World Championship against breakout star Josesito Lopez, is presented by Golden Boy Promotions and Canelo Promotions in association with Goossen Tutor Promotions and Thompson Boxing Promotions and sponsored by Corona, DeWalt Tools, AT&T and O’Reilly Auto Parts.  In the co-featured attractions, WBC Featherweight World Champion Jhonny Gonzalez defends his crown against former World Champion Daniel Ponce De Leon in fight presented in association with Promociones Del Pueblo, former World Champion Marcos Maidana faces perennial contender Jesus Soto Karass in a 12-round fight for the vacant WBA Intercontinental Welterweight Title presented in association with Universum Box-Promotion and Leo Santa Cruz defends his IBF Bantamweight World Championship against former Two-Time World Champion Eric Morel.  The Saturday, Sept. 15 quadruple-header, packed with Mexican pride and power, will take place at the MGM Grand Garden Arena in Las Vegas and will be televised live on SHOWTIME Saturday, Sept. 15 at 9:00 p.m. ET/6:00 p.m. PT with preliminary fights to air live on SHOWTIME EXTREME® at 8:00 p.m. ET/PT. Photo Credit: Tom Casino / SHOWTIME

SHOWTIME CHAMPIONSHIP BOXING FINAL WEIGHTS:

CANELO ALVAREZ: 154 Pounds

JOSESITO LOPEZ: 153 Pounds

JHONNY GONZALEZ: 125 Pounds

DANIEL PONCE DE LEON: 125 ½ Pounds

MARCOS MAIDANA: 147 Pounds

JESUS SOTO KARASS: 147 Pounds

LEO SANTA CRUZ: 117 Pounds

ERIC MOREL: 118 Pounds