Anecdotal evidence, I played rugby in college. We'd send at least one person to the hospital every game. But few head injuries. A friend of mine who played foot

Anecdotal evidence, I played rugby in college. We'd send at least one person to the hospital every game. But few head injuries. A friend of mine who played football played rugby the spring of his senior year, and promptly broke his neck by leading with his head when tackling as he was used to. Fortunately he didn't sever anything, no permanent damage. Personally I think a lot of our injuries were because we had a lot of former football players who were used to a different sport. It takes time to adjust. My "career" (fun hobby) ended from a ridiculous move from an overzealous opponent that destroyed my shoulder. If we were wearing football gear everything would have been fine. I wonder if rugby players in the US get injured more frequently than in other countries because of our legacy of American football.