You said the owners are greedy right? So why would an owner give up a percentage of his team stock to someone who will eventually retire whether it be 3 yrs ,7 yrs, 10, 15.. that means dude would still be getting paid yrs later after the game passes him by. Hell what if leaves to go to another team , he would still own stock with that team even if he's not on it making revenue. No owner would do that. Longevity money over short term. Owning a team is long term giving a person who hot right now that much power for extension is a no go. This would open up the floodgates for other athletes wanting that which would mean owners losing power and money to the players which they don't want no parts of that. So they would rather get together and blackball a player who thinks he deserves that instead of falling in line with his demands