What do you think is the ugliest rivalry in sports?

Some that come to mind for me are Blackhawks-Redwings, Yankees-Red Sox, Bruins-Canadiens, Bears-Packers, Giants-Patriots, and Penguins-Flyers.

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Viper · M

Bengals and Steelers had a ton of cheap shots plays against each other, 5 to 15 years ago... lots of dirty in those games.

Steelers and Ravens too, but that was more good hard physical play from both sides.

BlueMetalChick · 26-30, F

@Viper Good point on the Baltimore and Pittsburgh one. That rivalry manifested mostly on the field.