Kate Upton has dumped the Tigers and is officially a Yankees fan

It looks like Kate Upton was caught two-timing the Detroit Tigers Friday night.  The Sports Illustrated swimsuit model showed up at sweltering Yankee Stadium to help cheer on the Bronx Bombers to a 4-1 win over the Boston Red Sox.

These photos from The New York Post show the Michigan native wasn't shy about flaunting her Yankees cap for the cameras

Even after the Subway Series debacle against their crosstown rivals this week, it looks like the good times are happening again in the Bronx.

Justin Verlander — eat your heart out.