Within a week at an NFL training camp it’s highly likely that two lineman will not only be fighting, but swinging their helmets at each other’s heads. In fact, this is such a common occurrence that coaches routinely let the fight play out before stepping in to break it up.

Spend an entire spring on a Major League Baseball team on the other hand, and you might find yourself in the middle of a benches-clearing shove match (those odds increase if Shelley Duncan is on your team).