@Will posted:"players may enter and leave the game, at will, on offense and defense as long as the number of players in the original batting order does not change".......Baseball?
In our section there is one re-entry per game for starters. With it, coaches can put in subs in the mid-late innings when they have a good, but not double-digit, lead, then bring the starters back to calm things down if the subs start kicking the ball around. Pitchers are not allowed to reenter as pitchers.
It's a great rule. It gets innings and at-bats to kids who would otherwise get very little.