A New York Yankees fan got so upset with a guy outside of the Pinstripes' game in Philadelphia on Tuesday night ... he unleashed a violent smack that appeared to do some serious damage.
The heated interaction all went down at some point either during or after the Yanks' 7-6 extra-innings win over the Phillies at Citizens Bank Park.
It's unclear exactly how the altercation started, but you can see in video from just outside the stadium, an Aaron Judge supporter got right in the face of a man who was wearing a black shirt and red shorts.