Do no harm: Who should bear the costs of retired NFL players’ medical bills?

After reading all of the posts from the workers comp experts I came up with these questions.
If Roger tripped and fell while walking into his Manhattan office and broke his femur, had surgery and was cleared by the Dr's after say 6 months or so to return to work then 15 years later after he retired his leg started bothering him and was unable to walk would he have a valid workers comp claim? If so how much would he get? As I understand it workers comp only is responsible to pay his medical bills and a settlement based on a percentage of disability of said leg. I have a hunch he gets lifetime benefits
Also since he was laid up for 6 months when it happened how much of his salary would he receive? Would it max out at the 3 or 4 hundred dollars other people who are unable to work because of a work related injury or would the NFL keep paying him while he was unable to work?
My point is this. Whatever deal Roger and the other NFL execs get the players, past and present, should get exactly the same if not more.