During the 2003 playoffs the Battalion started what would eventually become a rivalry with the Barrie Colts defeating the Colts in the first round in six games. The second round would see the top two in the division as the Battalion faced Toronto. Brampton started off the series well beating Toronto in game 1 by a 7–0 score. However Toronto eventually proved too much for Brampton as the Majors would win four straight and take the series in only 5 games.