Bowler 1. Get a bat (knockback sword) from one of the chests. 2. Stand at the bowler's spot. (the middle square) 3. Spawn a villager using one of the dispensers. 4. Bowl (hit) it to the batter. 5. If the ball hits you before the floor. You caught it. 6. If the ball hits the floor. Throw it to 1st/2nd/3rd base. (You may need to use a Healing splash potion on it first.
1. Get a bat (knockback sword) from one of the chests. 2. Stand at the batter's spot/cage. (the square next to the cage) 3. Wait for the bowler to bowl. 4. Hit the ball out of the park. 5. Run to (1st/2nd/3rd etc.) base. 6. If you miss, you get a strike (three strikes and you're out.) 7. If you get 3 bad balls, you walk to 1st base.
Fielder 1. If the ball comes your way. Hit it to 1st/2nd/3rd base and get one of the batters out.