3rd Baseman reacts to hard-hit balls to his glove and his backhand side.
The LF fields the ball and throws to the 3rd baseman (cut-off man), who lets the ball go through to the plate or cuts it off and throws to the SS covering 3rd for a run-down play on the runner, who has broken around 3rd base.
3rd Baseman gets down on both knees, which forces him to get his hands out in front of his body, and fields grounders hit by the infield coach.
3rd Baseman, SS, Left Fielder, same play as above but with the coach hitting the ball to short left field and down the left-field line.
Catcher, 3rd Base, 1st Baseman practice the 5-2-3 double play, with the infield coach hitting ground balls to the 3rd baseman, who fields the ball and throw to the catcher, who then goes to 1st base.
2nd Baseman & 3rd Baseman play in on the grass to field hardhit ground balls hit to them by the infield coach.
If, with two outs, the defender with the ball is running down the back runner and is within two feet of him when he hears the 3rd baseman call "four-four," he should try to tag out the runner before the front runner crosses the plate.
If the runner begins to creep down the baseline and can be picked off, the 3rd baseman will call "three-three.
If the 3rd baseman has both arms stretched overhead (touchdown), the catcher should throw to 3rd from inside the diamond.
If the catcher throws to him, he must run hard at the runner, staying alert for a call from the 3rd baseman.
If the lead runner has taken too big a lead, the 3rd baseman will throw up his arms (touchdown) to indicate that the runner can be picked off.
Catcher: As he catches the ball, he takes a quick look at the 3rd baseman.