> Perhaps a league for retired stars would do well.

Isn't that the role MLS plays for European soccer players? I'm not complaining, but many players who are no longer in their prime (Zlatan, Beckham, Messi, Son, etc) come over here to end their careers.

When it comes to retired players 50 and above, I question how many of them would want to continue pushing themselves physically, much less how many of them could do so.