Darts

Curling.

Magic: the Gathering

It's a sport if it was on ESPN!

Do I have to me good at it or is someone just going to pay me to do it regardless? I guess motorsport

Online Chess is now officially Esport... so that... xD

I'd be the next Hikaru Nakamura, live stream chess stuff and act cool af.

Snooker.

Bowling

Chess

Swimming.

Archery

Golf.

Naked twister.

Ranked Competitive Sex.

Disc Golf!

Foxy Boxing

Ping pong. You might think all the humiliating losses as my reflexes slow down might become hard to take, but if they don't bother me now, why should it bother me later?

Chess

Rowing or swimming. As long as I'm not trying to be world record level, I won't be ruining my body. If I'm just training as much as they do, it won't be much worse than a full time job.

I would have picked skydiving, but the lead exposure is a little too much for me to want to do it as a 10 jumps a day type of job.

If esports count, I'd like to be like this guy and get a contract to play rhythm games professionally

Otherwise... Probably swimming or race walking, not too many professional sports I could think of that one can do into their 60s without wrecking their body

Billiards.

Marion Tinsley died at age 68 while still holding the World Checkers Championship. A number of chess players including Ivanchuk and Anand are in their 50s and still mighty strong, though not WC strength.

https://en.wikipedia.org/wiki/Marion_Tinsley

Quidditch, because it would change the laws of physics and everything would probably explode in a hilarious hellfire

Do esports count? Because that.

Race car driver

Cricket. There are many different roles in the team and you get to hang out outside with your teammates all day. Also, if it rains you go inside and have something to eat.

How about E Sports? I'm not competitive good, but I can play video games all day.

Disc Golf

Every last one of you could have chosen drone racing and yet none of you did.

Drone racing.

Chess boxing https://en.wikipedia.org/wiki/Chess_boxing

Biking or swimming

Darts

Table Tennis. (A.K.A. Ping Pong, but that's actually a trademark)