When I graduated from high school I was 155 pounds - not exactly large. Which is part of my point here. For pro calibre players, significant physical growth oft

When I graduated from high school I was 155 pounds - not exactly large. Which is part of my point here. For pro calibre players, significant physical growth often happens in those college and early pro years. If you've never stood next to a professional player - even the smaller ones - they are physical freaks, at least during their playing years. The typical pre-college player in this country is a much more normal-bodied person, thus assuming good technique, etc, they are no more at risk playing American Football than any other sport.