They are big, but soft. Not bodybuilder big. They are about natural limit big with alot of bodyfat. Dieted down to 10% bodyfat they would drop 60 pounds minimum
They simply don't have that "swole", or volumized muscle look that a bodybuilder on high androgen use gets.
No kidding, but, they are more "strength and power" athletes and NOT trying to be bodybuilders.
These are genetically taller, bigger men or what many used to call " country boy strong".
Obviously bodybuilders LOOK like they have bigger muscles because that's their main thing.
An NFL lineman or elite level thrower has performance objectives.