They will appreciate that. It's often hard for them to take a break during the game for that. Don't just show up at game time or practice time. It all takes work, from lining the field with chalk to laying down the bases. And, of course, when the game is over, it all has to be put away.
Bases have to be picked up, trash dumped and the park locked up.
There is plenty to do. Make it your business to keep our parks clean. Offer to work in the concession an extra turn. Please remember, all of us are volunteers. We all work full-time jobs and have a home life.