The NHL season doesn't start in September, but a lot of other leagues (pro, junior, etc) get the regular started this month, or at the very least play preseason games like the NHL.
The NAHL is USA Hockey's Tier II junior league and their preseason has already started with a bang. During a game between the Corpus Christi IceRays and the Lone Star Brahmas, things got out of hand to say the least which led to the goalies dropping the gloves.
Goalie fights don't happen often during the regular season, so you just know tensions were running high because these two goalies fought during a preseason game.
(H/T: Rob Sanderson)