This morning I noticed a guy wearing a Chicago Bulls baseball cap. I'm not into sports -- but isn't the Bears the Chicago baseball team?
So, putting a football team on a baseball cap -- that seems... incorrect.
(May 8, 2015 -- UPDATE -- Perhaps my intended point was that somehow baseball caps have become universal enough to be divorced from the sport that spawned them. To use the teams that I actually am familiar with: having a "fan" baseball jersey that says "Mariners", or a "fake" football jersey that says "Seahawks", or a basketball jersey that says "Supersonics" makes sense. But a basketball jersey that says "Mariners" would be weird.
But a baseball hat that says "Supersonics" would be accepted. And no one notices the disjuncture.)