You are deny that Killer has been crippled by his injury, in that it has not had a major impact on the way he has led his life, and how he will lead it in the future ?
Yes, the bloke has worked a miracle to get himself fit, back on the field and to win a professional contract again, but it is clear that there the miracle ends.
The bloke is clearly in agony after every game. I would rather he got on with his life away from pro football and out of continual pain and discomfort.
You want to get on your moral high-horse and view use of the word "cripple" as a term of abuse without any context, you go ahead. But it makes you look foolish.