A triple-bill of knockout kings go into battle to secure their world championship titles: Shawn "Showtime" Porter (24-0-1, 15 KOs) defends his belt against unbeaten welterweight Kell Brook (32-0, 22 KOs); super middleweight Anthony "The Dog" Dirrell (26-0-1, 22 KOs) goes after Sakio "The Scorpion" Bika (32-5-2, 21 KOs) in hot pursuit of the crown; and Omar Figueroa (23-0-1, 17 KOs) risks his lightweight title for the second time against challenger Daniel "Tremendo" Estrada (32-2-1, 24 KOs). Live from the StubHub Center in Carson, California.