I admire this sort of decision making. In particular, I admire that he took the risk playing football in the first place but called it at some prerequisite leve

I admire this sort of decision making. In particular, I admire that he took the risk playing football in the first place but called it at some prerequisite level of damage he was willing to take. I'd imagine that is something he put a hard stop on before embarking on the career: "two concussions max then I'm out whatever".