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NEW YORK, NY - MAY 04: CC Sabathia and Carsten Charles III Sabathia attend the Chicago Bulls Vs Brooklyn Nets Playoff Game at the Barclays Center on May 4, 2013 in the Brooklyn borough of New York City. (Photo by James Devaney/WireImage)

Yankees pitcher CC Sabathia wearing a Brooklyn Dodgers hat.

Hat controversies — in sports

As silly as it may sound, something as trivial as a hat can trigger a storm of controversy. A hat is just a hat, but to a diehard fan, wearing the wrong one can be a sign of disrespect. This collection of photos also reveals that hats can be politically incorrect and even break hallowed traditions. We’ve scoured the internet and found some of the most memorable controversies caused by wearing the wrong headgear.