And a ton of linemen in football, actually several tons of them.

It's funny you see very very few fat hockey players, even fewer than you see fat guys in hoops. You can usually count the overweight guys in the league on one hand. Some of them have been pretty good players, Keith Tkachuk got real fat at one point and the Blues suspended him. If you're above like 10% body fat that's rather unusual. Byfuglien almost certainly is, but he carries his weight really well.