How to Throw a Submarine Pitch: Step-by-Step Mechanics Guide

Chad Bradford made a career out of a delivery that looked physically impossible. His knuckles nearly scraped the mound dirt on every pitch. Hitters who faced him every day still couldn't square him up, because the ball arrived from an angle the human visual system simply wasn't wired to process efficiently. Bradford wasn't the hardest thrower in the bullpen. He was the most disorienting.

The submarine pitch is not a trick or a gimmick. It is a legitimate, biomechanically sound delivery that produces extreme arm-side run, a flat approach angle into the zone, and a release point that sits 18 to 24 inches below where hitters expect the ball to emerge. Combined with the mental edge of unpredictability, it becomes one of the hardest deliveries to time in amateur baseball.

This guide breaks down every mechanical component — stance, hip drive, trunk tilt, arm path, grip, and release — so you can build a real submarine delivery rather than just dipping your arm slot and hoping for the best. There is a significant difference between the two, and that difference is what separates effective submarine pitchers from guys who just hurt their elbow trying.

What Actually Defines a Submarine Delivery

Before touching mechanics, you need to understand what separates a true submarine slot from a sidearm or low three-quarter delivery. The distinction matters because the mechanics that make each one work are fundamentally different.

A sidearm pitcher releases the ball roughly at hip height with the arm nearly parallel to the ground, but the torso stays relatively upright. A low three-quarter pitcher drops the arm slot below the traditional over-the-top position but still releases well above the hip.

A submarine pitcher releases the ball below the hip, with the hand often at knee height or lower. This is only possible because the entire torso tilts dramatically toward the throwing-arm side — the chest can be nearly parallel to the ground at the moment of release. The arm is not simply dropped; the whole body reorganizes around a different axis.

The key diagnostic:

If your release point is below your hip and your glove-side shoulder is pointing toward the sky at release, you are throwing submarine. If your torso is still upright and you've just lowered your arm, you are throwing sidearm with extra elbow stress — which is exactly the combination that causes injuries.

This distinction also explains why the submarine delivery, done correctly, is not inherently more dangerous than a conventional slot. The extreme trunk tilt keeps the elbow below the shoulder throughout the motion, which is actually a mechanically safe position. The danger comes from trying to get a low release point without the corresponding trunk tilt — that puts enormous stress on the UCL and shoulder capsule.

The Foundation: Hip Drive and Trunk Tilt

Every mechanical error in the submarine delivery traces back to the same root cause: trying to get the arm down without first getting the body down. The arm slot is a consequence of the body position, not a cause. Build the body mechanics first and the arm slot follows naturally.

Step 1: The Setup and Stance

Start from the stretch position — most submarine pitchers work exclusively from the stretch because the windup introduces additional moving parts before you've grooved the core mechanics. Stand with your feet roughly shoulder-width apart, weight centered. Your throwing-arm shoulder should feel relaxed, not artificially dropped.

Do not pre-tilt your trunk before you begin. The tilt happens as a result of the hip drive during the delivery, not as a starting position. Pitchers who set up already tilted tend to lose power and create mechanical inconsistency.

Step 2: The Leg Lift and Weight Shift

Lift your stride leg to a comfortable height — submarine pitchers typically use a lower leg lift than traditional pitchers, roughly to mid-thigh. A high leg lift makes it harder to execute the hip drive and tilt combination that defines the delivery.

As the stride leg comes down, drive aggressively toward the plate. The stride length for a submarine pitcher is typically longer than a conventional pitcher — 90 to 100 percent of body height rather than the standard 80 to 90 percent. This longer stride is what initiates the trunk tilt.

Step 3: The Hip Drive and Trunk Tilt

This is the most important mechanical element. As your stride foot lands, your hips rotate hard toward the plate — but simultaneously, your entire trunk tilts aggressively toward your throwing-arm side. Think of it as your glove-side hip driving up while your throwing-side hip drives down and forward.

At the peak of this tilt, your throwing-arm shoulder should be pointing nearly at the ground and your glove-arm shoulder pointing nearly at the sky. Your spine angle relative to the ground might be 30 to 45 degrees or more at release — far more extreme than any conventional delivery.

Practice this tilt in a mirror with no ball. Stand and execute the stride and tilt in slow motion until the body position feels natural. Many pitchers need two to three weeks of daily dry runs before this coordination clicks.

Arm Path, Release Point, and Follow-Through

Once the trunk tilt is established, the arm path becomes much more intuitive. The arm is not doing anything mechanically unusual relative to the tilted body — it is swinging in a normal arc relative to the shoulder. It just happens that the shoulder is now pointing at the ground.

Arm Circle and Path

The throwing arm swings in a downward arc from the glove break. Think of it as a pendulum swinging toward the ground rather than up and over. The elbow stays below the shoulder throughout the entire motion — this is non-negotiable. If the elbow rises above the shoulder at any point, you have lost the submarine slot and created injury risk.

The Release Point

Release happens when the arm reaches the lowest point of its arc — roughly at knee height for most pitchers, sometimes lower. At release, your wrist should snap upward (toward the sky from your body's perspective, which is actually toward the plate from the catcher's perspective). This wrist snap is what generates spin and velocity from such a low angle.

The Glove Side

Your glove arm is critical for balance during the extreme trunk tilt. As the throwing arm swings down, the glove arm pulls back and upward, helping maintain balance and generating rotational torque. Many submarine pitchers let the glove arm fly open too early — keep it tucked until hip rotation is complete.

Follow-Through

After release, the throwing arm continues across the body toward the glove-side hip. The trunk naturally rotates back toward upright as momentum carries you through. You should finish in a balanced fielding position — submarine pitchers are notoriously poor at fielding their position if they don't practice the follow-through to a ready stance.

Film yourself from the side and from behind the mound:

The side view reveals whether your trunk tilt is deep enough and whether the elbow stays below the shoulder. The behind-the-mound view shows whether your release point is truly below the hip or whether you're throwing sidearm with a slight dip. Most pitchers are shocked to discover their perceived release point is 6 to 10 inches higher than they thought.

Grip and Pitch Selection from the Submarine Slot

The submarine slot changes how spin interacts with the ball's trajectory. Grips that produce predictable movement from an over-the-top slot behave differently — and often more dramatically — from below the hip. Understanding this lets you build an arsenal rather than just throwing one pitch from an unusual angle.

The Submarine Fastball (Two-Seam)

The two-seam fastball is the cornerstone pitch of the submarine arsenal. Grip it with your index and middle fingers along the two narrow seams, thumb underneath for support, and ring finger resting lightly on the side of the ball.

From the submarine slot, the natural wrist position at release imparts heavy arm-side spin. For a right-handed pitcher, this means the ball runs hard toward a right-handed batter's hands and away from a left-handed batter. The movement is not subtle — submarine two-seamers can run 8 to 12 inches arm-side, significantly more than the same grip thrown over the top.

Focus on throwing this pitch to both sides of the plate. The arm-side run means you aim for the outer half against left-handed hitters and trust the ball to find the inner half against right-handed hitters.

The Submarine Sinker

The sinker is the submarine pitcher's most valuable weapon. Use the same two-seam grip but pronate your wrist slightly more aggressively at release — turn the palm more toward the ground as you snap through. This adds downward spin on top of the arm-side run.

A well-thrown submarine sinker arrives at the knees with late arm-side movement, producing weak ground balls at an extraordinary rate. This is why submarine specialists are so valuable in ground-ball situations — they don't need strikeouts to get outs.

The Submarine Slider

This pitch breaks in the opposite direction from a traditional slider. For a right-handed submarine pitcher, the slider breaks away from right-handed hitters (glove side) rather than down and in. Grip it with your index and middle fingers slightly off-center toward the outer third of the ball, thumb underneath.

At release, cut the ball by pulling your index finger down the side of the ball rather than snapping through the middle. The movement is more horizontal sweep than downward break — typically 4 to 8 inches of glove-side movement with minimal vertical drop.

Used after establishing the fastball, the submarine slider looks identical out of the hand and then breaks the opposite direction. This is the combination that makes elite submarine pitchers nearly unhittable in short stints.

A 4-Week Progression to Build Your Submarine Delivery

Do not walk onto a mound and try to throw submarine at full effort on day one. The mechanics require new muscle memory that your body hasn't built yet. This four-week progression lets you develop the delivery safely while building the arm strength specific to this slot.

Week 1: Dry Runs and Trunk Tilt Drills (No Ball)

Spend 10 minutes daily executing the delivery mechanics with no ball. Stand in front of a mirror and practice the stride, hip drive, trunk tilt, and arm circle in slow motion. Focus entirely on getting the trunk tilt deep enough and keeping the elbow below the shoulder.

1.Execute 20 slow-motion dry runs focusing on trunk tilt depth. Pause at the release position and check in the mirror.
2.Execute 20 dry runs at half speed, focusing on the glove-arm pull and balance through the follow-through.
3.Film two sets of 10 reps from the side and review the elbow position throughout the arc.

Week 2: Flat Ground at 50 Percent Effort

Move to flat ground with a partner at 30 to 40 feet. Throw at half effort, focusing entirely on replicating the mechanics from Week 1 with a ball in hand. Do not worry about where the ball goes — worry about how the delivery feels.

Throw 30 to 40 pitches per session, 3 to 4 sessions this week. Rest at least one day between sessions. Your arm will feel the new stress of the different slot — this is normal. Sharp pain is not normal and means you should stop immediately.

Week 3: Flat Ground at 75 Percent, Introduce Grips

Increase effort to 75 percent and extend the distance to 45 to 50 feet. Begin practicing the two-seam fastball grip and sinker grip, feeling how each one affects movement at this effort level.

Start developing a pre-pitch routine that includes a brief mechanical cue — a single thought like "tilt and drive" that anchors the key movement before each rep.

Week 4: Mound Work at Game Effort

Move to the mound and throw at full effort in bullpen sessions. The slope of the mound actually helps submarine mechanics — the downhill angle amplifies the trunk tilt. Many pitchers find their submarine delivery clicks more naturally on the mound than on flat ground.

Throw 40 to 50 pitches per bullpen session, mixing fastballs and sinkers. Do not introduce the slider until Week 5 or 6 — get the foundation pitches locked in first.

The Mental Game of Pitching Submarine

Submarine pitchers face a unique psychological challenge. The delivery looks so unusual that coaches, teammates, and even parents will question it. You will get comments about it being "wrong" or "bad for your arm." You need a strong mental foundation to stay committed to developing a skill that takes weeks to groove before it produces results.

The championship mindset required here is one of process over outcome. During the development phase, your velocity will drop, your command will be inconsistent, and hitters will square you up more than they should. This is temporary. Every elite submarine pitcher went through this phase.

Use visualization techniques specifically tailored to the submarine delivery. Before each bullpen session, spend two minutes with your eyes closed seeing the perfect trunk tilt, the arm arc below the hip, and the ball exploding out of your hand with run. Mental rehearsal of the new mechanics accelerates physical learning significantly.

Track your progress objectively:

Film every bullpen session and compare Week 1 to Week 4. Mechanical improvement is often invisible in the moment but obvious on video. Seeing your own progress is one of the most powerful motivators for staying committed through the frustrating early stages of learning a new delivery.

Frequently Asked Questions

Frequently asked questions

When learned correctly and gradually, the submarine delivery is not inherently more dangerous than a traditional arm slot. The key is that the mechanics must be natural — your torso tilts dramatically toward the throwing-arm side, which keeps the elbow below the shoulder and actually reduces certain types of UCL stress. Forcing a submarine slot without proper hip and trunk tilt is where injury risk rises. Work with a pitching coach and build arm strength incrementally over several weeks before throwing at full effort.

A true submarine delivery has the hand below the hip at the point of release, with the arm nearly parallel to the ground. The release point is typically between knee height and hip height. This is distinctly lower than a sidearm slot, where the arm is roughly parallel to the ground at shoulder height. The trunk tilt is what makes this possible — a submarine pitcher's chest can be nearly parallel to the ground at release.

The fastball and sinker are the foundation of any submarine pitcher's arsenal. From that low angle, a two-seam fastball with natural arm-side run becomes extremely difficult to track. A submarine slider breaks in the opposite direction from a traditional slot — it sweeps away from a same-handed batter rather than down. A submarine curveball is rare but effective. Most submarine pitchers rely on a fastball, sinker, and one breaking ball rather than a deep pitch mix.

Yes, though the platoon advantage typically favors same-handed matchups (righty submarine vs. lefty hitter). Against right-handed batters, a right-handed submarine pitcher's fastball runs in toward the hitter's hands, jamming them. The angle is so unusual that even hitters who see it regularly struggle with timing. Many submarine specialists are used situationally regardless of batter handedness because the visual disruption alone creates weak contact.

Most pitchers need 4–8 weeks of consistent practice to develop a mechanically sound submarine delivery at reduced intensity, and 3–6 months before they can throw it at game speed with command. The biggest variable is how naturally the trunk tilt comes to a given pitcher's body. Some athletes adapt quickly; others find the coordination of hip drive, trunk tilt, and arm path takes longer to groove. Daily dry-run repetitions (no ball, just mechanics) dramatically accelerate the learning curve.

The Bottom Line

The submarine delivery is not a shortcut or a novelty act. It is a legitimate pitching style with a clear mechanical blueprint: aggressive stride, deep trunk tilt toward the throwing-arm side, elbow below the shoulder throughout, release below the hip, and a wrist snap that generates spin from an angle hitters almost never see.

The pitchers who succeed with it are the ones who commit to the four-week progression, film themselves relentlessly, and refuse to let early inconsistency shake their confidence in the process. Chad Bradford wasn't born throwing that way. He built it, rep by rep, until it became the most reliable weapon in his arsenal.

If you're serious about developing the full mental and physical toolkit that makes pitchers dominant — not just mechanically sound but mentally unshakeable on the mound — the Mind & Muscle app gives you structured mental training protocols built specifically for baseball pitchers.

And if you're a hitter trying to figure out how to hit submarine pitchers, that guide breaks down exactly what adjustments give you the best chance against this delivery.

How to Throw a Submarine Pitch