The team I ran with in California had a few guys in their 60s, even one guy who turned 70 before I left the team. There was no fukin around with these guys, true grit, and dedicated players (some were vets). They were also either retired or retiring so a side benefit you might say is they had $$ to spend on some cool shit including a deuce and half transport truck, a Willys Jeep and other shit generally out of reach for the rest of us. They put their heart into every game and inspired some of the younger players to play harder and better.
Personally, I'll stop playing when I'm good and ready...