Maybe it has something to do with the "ex" part. (100% tongue-in-cheek)
Some people don't like it when former MLB players (or top level athletes in any sport) won't give it up after they can no longer compete at the top level, but I'm all in favor of it. If he wants to play and someone will have him on a pteam, let him play.
I played slow-pitch softball through age 45, when my knees just would no longer allow it. When my wife asked when I was going to quit, I would tell her "when they pry my DeMarini from my cold, dead hands," but it didn't last quite that long.
Now I umpire.