In SP, if it's hit their own ball, I always tell the coaches/captains in pregame to have a back-up ball ready. It's kind of a hassle in the lower level leagues because they keep forgetting this easy task, but the Open League in Omaha isn't so bad. They come in with a couple of boxes ready and have the umpires check to see that they are legal. Every time they hit one out, they just throw one in from the box, fresh and ready to go join the rest of the over the fencers.