It's only April, but two fans of AL East rivals are fighting like it's September.
Via The Big Lead comes a video of a Yankees fan brawling with an Orioles die-hard at Camden Yards. Neither of them have any shirts or jerseys to indicate who's rooting for whom, but the video is titled "Orioles and Yankees fan fight."
Either way, someone loses his shirt in the process as haymakers are thrown and security comes to eject the pugilists.
Here's the video below, though here's a WARNING: There is some NSFW language in the it.