Machine-Fed Dirt-Ball Blocking: The High-Volume Way to Raise Block %

Ask most coaches how they teach blocking and you'll hear a version of the same answer: "We block during bullpens." That's fine for realism, but it's a terrible way to build the skill. In a normal bullpen a catcher might see five or six genuine balls in the dirt an hour, and each one arrives at a different speed, spot, and spin. That's not enough repetition to turn blocking into a reflex, and it's too random to isolate what's breaking down. The machine-fed dirt-ball blocking drill fixes both problems at once. This guide explains why it works, how to run it, and how to turn it into a number you can actually track: block %.

Why blocking is a volume skill

Blocking a ball in the dirt is not a decision the catcher has time to make. The hop happens, and the body either reacts correctly or it doesn't. Skills like that are built through high-quality repetition until the movement pattern fires automatically under stress. The problem is that the game — and even a normal practice — simply doesn't produce enough bounced balls to build that automaticity.

A pitching machine changes the math. Set it to skip the ball a few feet in front of the plate, feed on a steady cadence, and a catcher can bank 40 to 60 clean blocking reps in about 20 minutes. That's roughly ten times the volume of a typical bullpen. Just as importantly, because the machine repeats the same speed and location, the catcher stops guessing and starts grooving one clean block over and over. When you do want randomness back, you feed it deliberately — corners, height, cadence — rather than hoping the pitcher misses in a useful spot.

The metric that matters: block %

The reason to run this drill instead of just "taking some blocks" is that it produces an honest, countable score. Define a 3-foot recovery radius around home plate with cones or a chalk line. If a blocked ball stays inside that radius, it's contained. If it kicks past, it's an escape. Block % is simply contained balls divided by total balls.

That one number does a lot of work. It gives the catcher a target (we recommend 80% as a passing session), it exposes fatigue (watch the rate fall in the fourth set), and it lets you compare week to week. When a catcher can see their block % climb from 68% to 84% over a month, blocking stops being a chore and becomes a game they want to win. It also gives you, the coach, a defensible way to decide who's ready to catch a bullpen with a runner on third.

Setting it up safely

Safety is non-negotiable here, because you are pointing a machine at a kneeling athlete. A few rules:

• Full gear, always. Mask, chest protector, shin guards, and a cup. The chest protector is what makes this drill safe; without it, don't run it.
• Start slow. Begin at 45-55 mph for 12U-14U and 55-65 mph for older catchers, and only raise speed once the athlete is staying relaxed and confident. Speed that induces flinching is training the wrong reflex.
• Aim short. You want the ball to short-hop 2-4 feet in front of the plate, not to arrive on a line. Dial the machine's angle and the feeder's aim until the hop is consistent.
• Mind the knees. Repeated drops to the dirt add up. Use knee-savers or a padded surface for younger catchers and cap total volume.

If you don't have a machine, or you're working with a newer or younger catcher, a coach front-tossing dirt balls from 15-18 feet is the right starting point. It's softer, more controllable, and you can read the catcher's mechanics up close. Front toss is the default entry level, not a consolation prize.

Running the reps

Set the catcher in a secondary (blocking) stance: weight on the balls of the feet, glove hanging between the knees, shoulders slightly forward. Feed a ball so it short-hops in front. The catcher drops to both knees, chin to the chest, chest angled forward over the ball, and glove filling the five-hole to smother it dead in front.

Keep a steady cadence — about one ball every four to six seconds. That pace is deliberate: it's fast enough to build volume and expose fatigue, but slow enough that the catcher can fully reset between reps. Quality of the set is what you're protecting; a rushed cadence that leaves the catcher half-set just teaches bad habits faster.

Most feeds should be centered, but mix in glove-side and arm-side short hops so the catcher learns to angle the chest and redirect the ball back toward the middle rather than letting it squirt into foul territory. Read the block % out loud after each set so the catcher hears the score climbing or slipping.

The cues that fix the most blocks

Five cues cover the vast majority of blocking breakdowns:

1. Chin to the chest. The head goes down so the mask, not the throat, meets any high hop.
2. Chest over the ball. Angle the torso forward so the ball deflects down and in front instead of popping up and carrying.
3. Soft and quiet. Relax the chest on contact to deaden the ball. A stiff, braced chest launches it out of the radius.
4. Fill the five-hole. The glove drops straight down between the knees so nothing sneaks underneath.
5. Beat the ball to the spot. Drop early and be set; don't reach or stab.

The single most common mistake — and the one that quietly tanks block % — is catching instead of blocking. When a catcher reaches with the glove, a ball that would have been smothered becomes a live rebound. If block % is stuck, look at the glove first.

How it fits your practice plan

This is a base-skill builder, so it lives early in a catcher's development block, before live-bullpen work. A good weekly rhythm: two short machine sessions to build volume and track block %, then one live bullpen where blocking shows up in context with real pitchers and runners. In-season, use it as a quick 15-minute tune-up; off-season, use it to build a big base of volume when there's time to log a lot of reps.

The progression is simple. Start with centered front toss and a 70% goal. Move to a centered machine feed at 80%. Add mixed corners at 80% across all locations. Finally, add fatigue and a recover-and-throw finish while still scoring contain rate, which bridges the isolated skill into game-situation blocking. Each level only opens once the catcher owns the one before it.

The bottom line

Blocking doesn't improve because you talk about it; it improves because a catcher does it correctly, hundreds of times, and can see the score go up. A pitching machine (or a coach's front toss) gives you the volume and the consistency, the 3-foot radius gives you the measurement, and block % gives you the story. Run it twice a week, coach the five cues, and watch the number climb.

Sources

• Driveline Baseball — catching development and the use of high-volume, measurable repetition to build defensive skills.
• American Sports Medicine Institute (ASMI) — guidance on protective equipment and managing repetitive musculoskeletal load in young throwers and catchers.
• MLB Pitch Smart — general youth workload and safety principles for baseball practice design.
• Positive Coaching Alliance — using clear, measurable goals to keep young athletes motivated and engaged in skill work.