Greedy - Having or showing a strong or excessive desire to acquire money or possess things, especially wishing to possess more than what one needs or deserves.
Certainly some of these players fit the definition of greedy. Take Dak, for example, He is making $40 million per year. In one year he will make more than 99% of Americans will make in a lifetime. If he now wants $60 million I would say that is excessive. It is certainly more than he will ever need. I could apply this same opinion to lots of players in the NFL. The argument that their careers are short is true for young players, but if Dak retired tomorrow, he will never need to earn another dime for the rest of his life based on what he has already made, and he would still live better than 99% or Americans. If the average American made $200,000 per year and worked 40 years he would earn only $8 million in his lifetime, and the average American does not earn anywhere near $200,000 per year.
Of course this is taken out of context. The players look at the owners and how much they are making and of course they think they deserve a good chunk of that pie. The owners are greedy too. The players copy the owners. In the end, the fans subsidize all this greed. And it is a vicious cycle. The players get more, the owners charge more for tickets, beer, and TV contracts, then the players demand more because the CAP increases with revenue.
If there was no greed, NFL tickets would cost $10 and NFL Sunday Ticket would cost $49 a season.