While coaching high school softball, we would always complete a defensive softball drill called “21” the day before each game. It is a very simple concept in which you place the starting line-up on the field to begin the first inning.
Using a fungo bat to hit the ball, I would create situations by having the team complete 7 innings and recording 21 outs. I would always make substitutions as desired and could work on bunt coverages, double plays, relays, sure doubles, etc. Extra players were used as baserunners as I hit the softball where desired to create a specific situation.
You could make the softball drill last as long as you wanted depending on the number of situations or substitutions you needed to review.
For this drill, I wanted to develop confidence among the players in making routine plays and the knowledge to effectively handle various situations. The kids loved the drill because it simulated a real game and was very face paced.