Mike Zigomanis scored at 9:02 of overtime as the Toronto Marlies advanced to the American Hockey League Western Conference final with a 3-2 win over the Abbotsford Heat on Wednesday.
The Marlies took the best-of-seven series 4-1 and will face either Oklahoma City or San Antonio in the next round.
Zigomanis converted a rebound in the slot on a power play while Abbotsford's Hugh Jessiman was in the penalty box.
Jake Gardiner and Matt Fratin also scored for Toronto while Ben Scrivens made 29 stops.
Paul Byron and Krys Kolanos replied for the Heat.
Danny Taylor made 32 saves in Abbotsford's first ever overtime playoff game in the franchise's three-year history.
The Heat opened the scoring while short handed at 3:03 of the first period. Byron took a feed from Jon Rheault, went in on a partial breakaway and beat Scrivens high with a point-blank slapshot for his first goal of the playoffs.
During a delayed penalty sequence the Heat doubled their lead. Adam Estoclet's shot from the left side was kicked out by Scrivens right to Kolanos, who roofed it over the sprawling netminder at 13:30 for his fifth of the post-season.
The Marlies got on the board at 14:32 of the first. Jessiman levelled Jerry D'Amigo to the ice, but not before he slid the puck over to Gardiner. The defenceman's slapshot from the point hit the post and went in for his third of the post-season.
Though the shots were even for most of the second period the Heat seemed to carry the flow of the play. Byron and Dustin Sylvester each had point blank chances with around seven minutes to go in the period, but Scrivens turned both of them aside to keep his club within one.
Marlies tied the game on the power play with two minutes to go in the second period. From behind the net Ryan Hamilton centred the puck to Frattin, and his one-timer shot squeaked through the pads of Taylor for his fifth of the playoffs.
Taylor made his best save of the game about two minutes in the overtime period. Nazem Kadri found himself in front of the Abbotsford crease with time, but his backhand attempt was snared by Taylor.
At 8:50 of overtime Jessiman was slapped with a high-sticking minor, giving the Marlies power play a fifth chance to work. Zigomanis converted the rebound for his third of the post season for the win.
Toronto ended 2-for-5 on the power play.
Abbotsford was 0-for-24 on the power play over the five games of the series.