In November 2003, Bartley stepped down due to his battle with colon cancer, and Comeau was promoted to interim head coach.
[1] However, less than four months later, after a 2-4 start, both Comeau and interim GM Derek Keenan were fired by the Rock,[2] replaced by Terry Sanderson.
In 2004, Comeau joined the Rochester Knighthawks as an assistant coach, and was then promoted to head coach at the beginning of the 2006 season, replacing Paul Day.
In 2007, the Knighthawks began the season 2-2, and then won a franchise record 12 straight games to finish the season with a 14-2 mark, tied for the best record since the NLL went to a 16-game schedule.
After the season, Comeau was named the winner of the Les Bartley Award for coach of the year.