There are an awful lot of similarities between MLS and NFL franchises (including but not limited to complaining about the lines on the fields in Seattle and New England).
Chicago Fire: New York Jets - The Fire and the Jets actually have more similarities than you think. The Jets won Super Bowl III, the Fire won the third MLS Cup. They both are one-trick ponies when it comes to chants ("Fire" vs. "J-E-T-S! Jets! Jets! Jets!" ad nauseum). And while the Jets are in line to make the playoffs this season, they were hot garbage for the past few years - just like the Fire.