In 2002-03, the Cougars won the Napa Cup as LHJAAAQ champions. They defeated the Longueuil College Francais in the finals. Lennoxville won the Fred Page Cup by defeating the CJHL's Nepean Raiders in the final and traveled to Charlottetown for the Royal Bank Cup, where they bowed out of the semi-finals to the Camrose Kodiaks of the AJHL.
In 2008 and 2009, the Cougars returned to the Fred Page Cup, but did not make the finals. In 2014, the Cougars played a close series with the Granby Inouk, who lost the series in 7 games. Sherbrooke came close again, against the Longueuil College Francais in the 2015 Napa Cup finals losing in 7 games, despite leading the series 2-0 and 3-2.