There are two options for the answer to this question. One of them being Anchorage Armada. Why come the alaskan team? Well you see, that is because of in the FHM8 sim the game has put them as the rivals. Simple as that. They are also our division rivals together with the Colorado Raptors, but both teams are fairly far off currently.
The other one is a much more personal rival of mine. The Newfoundland Berserkers. They always have the upper hand on us. They always seem to have that nagging ability of completely being too good to be true. Despite us having such an easy time with them this season, and despite them being bad currently. And then looking at the standings, they aren't even the worst team in their own division!

Rivalry is a strange thing that make teams, fans and players alike do some weird shit in the name of hatred for other teams. I love it.