This is actually a very typical age for an NFL player to die at. There was a study that compared age of death for NFL players to age of death for MLB players. The NFL average age of death was 59.6. MLB 66.7
I kind of doubt the average age of death has gone up since the paper was published. If anything it might be down a bit. That would be my hypothesis.
I personally think it's something to remember when we watch these guys perform. They are literally taking years off thier life for our entertainment. Knowing this, how can we blame them for wanting "too much money"? And take the ownership line that these players are selfish when they want new contracts or take the contract with the most money?