Braden Walker made his WWE debut on January 29, 2008. Harris was pinned by Shelton Benjamin in his WWE debut on March 11, 2008 in a dark match. A bloated Walker made his WWE television debut on the July 8, 2008 episode of ECW, defeating Armando Estrada. It was during this feud that the famous catchphrase "I'm Braden Walker and I'm going to knock your brains out" was coined, following a knock-knock joke he had told Estrada. He wrestled one more match, a pinfall victory over KC James, before he was released from his WWE contract on August 7, 2008.