I did some research on this and found the NFL will pay an active player who suffers a "total and permanent" injury $165,000 per year.
Here's the catch: the NFL and its insurance coverage, sadly, DOES NOT WANT TO PAY. Look up Charles Dimry and his lawsuit against the NFL (Dimry v. Bert Bell/Pete Rozelle NFL Player Ret. Plan, 16-CV-01413-JD, 2016 WL 7971198, at *1 (N.D. Cal. June 14, 2016)). The NFL alleged that Dimry's cervical injuries weren't "total" because he could work a desk job. Well, a lot of people with only one arm work desk jobs so it's very possible the NFL and its coverage will attempt to deny Norton on that same basis. The league giveth no fvcks.