Bobby Lashley made his debut on ECW as the final member of the Extreme Elimination Chamber for ECW's December To Dismember. He became a dominating champion.
In one match he took out all the ECW Originals. In another Mr.Mcmahon made him defend the title against Hardcore Holly in a steel cage match, where if Lashley couldn't win in five minutes Hardcore Holly would become champ.
Lashley desimated everyone in his way on ECW and nobody could seem to stop him.
This is when the ECW Championship was in it's prime as a World Championship, after The Undertaker won the Royal Rumble he even showed up and contemplated facing Lashley for the belt.
Ultimately, Lashley would represent Donald Trump in a battle of the billionaires match up at Wrestlemania and defeated Umaga, Mr.McMahon's selection. The victory resulted in McMahon being shaved bald and Lashley engaged in a long feud with the entire McMahon family.
Lashley thrived in the feud, beating essentially everyone McMahon threw at him. He defeated Kenny Dykstra to defend his title, defeated Umaga in a rematch ,and broke the never Broken Mater Lock in Chris Masters' Masterlock Challenge.
McMahon got vengeance when he won the title by beating Lashley in a three on one handicap match. Lashley spent the next month beating McMahon's son and Umaga in numerous matches, but couldn't get the title back until he pinned McMahon.
He eventually defeated McMahon in a street fight. To recapture the title, a week later he was drafted to Raw and was forced to vacate the title, because it belonged to ECW.
Lashley feuded with the current WWE Champion John Cena. He was given to matches against the champ once in a six pack challenge at Night Of Champions and then at The Great American Bash both times he came u short. Lashley then suffered an injury in a match against Mr.Kennedy and was out indefinetly.
While recovering Lashley asked for his release and it was granted. He later revealed he asked for his release because he wanted to focus on an MMA career.