M.S.
LOL!! Ya know, I've often wondered about Robin Williams and other comedians and how their WIVES handle the constant "on", but didn't think about the moms!
I have a funny one, but he isn't like that all the time. I enjoy it and welcome it, but I guess if he was getting in trouble at school or so into his routine on the field, that it was dangerous, I might get concerned. I suppose the comedy routine would be welcomed unless it's a situation like the above. Maybe explain that you love his gift of comedy and how wonderful it is to make people laugh, but there are times where it needs to be scaled down. Explain that baseball can be dangerous if you're not paying attention. Then, find an activity that doesn't involve hard objects being thrown or hit in any direction! What about music or like previously mentioned..theater! There's a time and a place for bits, but the ball field isn't one of them. The duggout is another story!!!! :)
Ya know, he could very well be the next Jim Carrey or Jack Black. I also agree, get it on video!!!
Good luck and feel free to share the laughs!!