Crow-Armstrong's vulgar outburst toward a heckler was another reminder that confronting fans is unwise (and often caught on camera).

Chicago Cubs star Pete Crow-Armstrong was fined for aiming vulgarities at a fan in Chicago, a source familiar with the matter told UPI on Wednesday.

"Anything physically usually starts mentally," Crow-Armstrong said. "I think that's just what I'm showing everybody right now."

Crow-Armstrong's vulgar outburst toward a heckler was another reminder that confronting fans is unwise (and often caught on camera).