01/07/2013 03:10 pm ET

The 50 Dirtiest Athletes In Sports History

What actions really define a "dirty" player? Concussion-causing hits? Physical abuse of refs? Grabbing balls (ayo!)? Spitting? Biting? Stomping?

After research, we found it's all of those things—and a bit more. From the NBA to figure skating, MMA to NASCAR, and all sports in between, check out our list of The 50 Dirtiest Athletes in Sports History. Enjoy the mayhem and brutality!

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