I've toyed with the idea the past couple springs of getting into a senior league, (some nice ballparks around my area), as I can still run, field and hit fine, but I do have bad knees, and one is really bad, (inner meniscus is totally gone in my right knee). I haven't done it yet, but I still consider doing it. Last time I played was about 12 years ago. Beside my knee problems , I know I'd be one of the most fit guys there.