Doring joined Extreme Championship Wrestling (ECW) in 1997, facing Taz in his debut match in May 1997. Doring's original gimmick was that of a wrestler who used many unexciting holds and had vertigo, so would not use high-flying moves. When the audience chanted "boring", Doring would pretend that they were chanting for him.
In December 1997, Doring changed his gimmick to that of a womanizer, and formed an unlikely tag team with Roadkill. They were managed by Angelica, his on-screen girlfriend, for six months, until she left ECW in November 1999, and then by Elektra until she turned on them in 2000.
Doring and Roadkill quickly embarked on a two-year-long feud with Nova and Chris Chetti. This was followed by a series of matches with Simon Diamond and Johnny Swinger and Joey Matthews and Christian York. The team won the ECW World Tag Team Championship on December 3, 2000, at the Massacre on 34th Street pay-per-view, defeating Tony Mamaluke and Little Guido. They held the title until ECW declared bankruptcy in April 2001.
Doring appeared at the WWE-promoted ECW reunion show, ECW One Night Stand 2005 on June 12, 2005. Following this appearance, he competed in try-out matches for the WWE SmackDown brand alongside Roadkill.
On May 5, 2006, WWE announced that Doring had signed a contract with them to appear on the upcoming ECW brand. On the June 13 edition of ECW, Doring took part in a battle royal (with the winner facing John Cena at Vengeance). Doring appeared on an episode of ECW against Mike Knox and lost to him. After losing a match to Rob Van Dam on the August 22 episode of ECW, he and Van Dam were both attacked by the returning Hardcore Holly. Doring wrestled a match of an ECW show in 2006 against CM Punk, which Danny would lose. He competed in live events with the likes of Nunzio and Kurt Angle, mostly in losing efforts.
He was released from WWE in December 2006.