On November 16, 2006, World Wrestling Entertainment announced that Cor Von had signed a contract with the company through their official website. He debuted for their ECW brand, under the ring name "The Alpha Male" Marquis Cor Von on January 16, 2007, in a win over Cassidy Riley. One week later, the spelling of the first name was tweaked to Marcus Cor Von.
On the edition of January 23 of ECW, Cor Von defeated Wes Adams. Not long after his debut, he was made a part of the New Breed stable. On the edition of February 6 of ECW on Sci Fi, Cor Von defeated Balls Mahoney. He and Kevin Thorn defeated Tommy Dreamer and The Sandman a week later. On the edition of February 27 of ECW, Cor Von, Elijah Burke, and Kevin Thorn defeated Rob Van Dam, Tommy Dreamer, and Sandman. On March 13, Cor Von was in an Extreme Battle Royal involving both the ECW Originals and the New Breed, but failed to win the match. On the edition of March 20 of ECW on Sci Fi, Cor Von and Kevin Thorn defeated ECW Originals Rob Van Dam and Sabu, with their feud with the ECW Originals climaxing in an 8-man tag match at WrestleMania 23, where The New Breed lost.
The next night on Raw, Cor Von and Kevin Thorn participated in a 10-team battle royal for the World Tag Team Titles, which was won by The Hardy Boyz. On the edition of April 3 of ECW on Sci Fi, The New Breed defeated The ECW Originals in an 8-man "Extreme Rules" match. On the edition of April 10 of ECW, Cor Von defeated Rob Van Dam. On the edition of April 24 of ECW, The New Breed faced the ECW Originals in an elimination match, but lost. At One Night Stand, The New Breed (Cor Von, Elijah Burke, and Matt Striker) faced CM Punk and The ECW Originals (Tommy Dreamer and The Sandman) in a six-man tag team tables match, which they lost. In late June 2007, Cor Von took several months off. After three months of inactivity, WWE announced on September 19, 2007 that Cor Von was released from his WWE contract without making his return to WWE television.