Haas formed a team with Shelton Benjamin and the two debuted on SmackDown in December 2002. They won the WWE Tag Team Championship twice, and dubbed themselves The World's Greatest Tag Team before they split in 2004. Haas won the WWE Tag Team Championship once more with Rico, and gained Miss Jackie, whom he later married, as a valet. Haas then transferred into singles competition before being released from WWE in 2005. After a short stint in Jersey All Pro Wrestling (JAPW) and other independent promotions, Haas was re-signed to WWE in April 2006. He formed a short-lived team with Viscera, before reforming the World's Greatest Tag Team with Benjamin. After Benjamin transferred to the ECW brand, Haas began wrestling with a comical luchador persona, before developing a character where he imitated other wrestlers and WWE Hall of Famers. In addition, Haas won the last match on WWE Heat when the show ended on May 30, 2008.
