On March 29, Peressini earned his first career playoff victory, coming in relief for Helvig in the third period, and made 14 saves on 15 shots, as the Frontenacs defeated the Oshawa Generals 5-4. Overall in the playoffs, Peressini had a 1-4 record with a 3.09 GAA and a .902 save percentage. Peressini joined the Western Mustangs of the OUA for the 2016-17 season. In his first game with the Mustangs on October 22, Peressini made 43 saves in a 4-1 loss to the Windsor Lancers. Peressini earned his first victory with Western on November 25, making 23 saves in a 6-3 win over the Laurentian Voyageurs.