When his team with skip Brad Jacobs won silver medals on 2013 World Men's Curling Championship, Matt Dumontelle was tested positive for the banned substance methandienone, an anabolic steroid, in a test following the world gold-medal game and he was disqualified on 2 years, this sanction ends on May 6, 2015. Until then he was ineligible to participate in any sport that is part of the Canadian Anti-Doping Program.