McMaster hung on to beat Guelph 17-11 Saturday to advance to the OUA football semifinal.
Mac’s Keldyn Ahlstedt intercepted Gryphons quarterback James Roberts at the goal line on the last play of the game to preserve the victory.
Mac roared back from a 10-3 halftime deficit to earn their first playoff victory under first year head coach Greg Knox.
Marauders QB Asher Hastings threw for 317 yards and an 8 yard touchdown to Dan Petermann with 7:20 to play to give Mac its first lead of the game.
Adam Preocanin booted three field goals and added a punt single in the win.
McMaster will visit Wilfred Laurier next week.
The Marauders lost to the Golden Hawks 29-15 in the 2015 OUA quarterfinal.