Is Submarine Pitching Better for Your Arm? The Real Answer

Chad Bradford threw with a delivery so extreme his knuckles nearly scraped the dirt. He pitched eleven seasons in the major leagues, made an All-Star team, and became one of the most durable relievers of his era. Coaches point to him as proof that submarine mechanics protect the arm. And in his case, they did.

But for every Bradford, there are dozens of youth pitchers who were told to drop their arm slot to save their elbow, only to end up with new pain in their shoulder, a nagging lower back issue, and a delivery so foreign to their body that their confidence collapsed before their mechanics did. The arm slot didn’t hurt them. The transition did — because nobody talked about the mental side of rewiring how you throw a baseball.

The honest answer to whether submarine pitching is better for your arm is: it depends — and the factors it depends on are more nuanced than most coaches, parents, or even pitching coaches acknowledge. This article breaks down what the biomechanics research actually says, who submarine mechanics genuinely help, and why the mental training component of any arm-slot change is just as critical as the physical one.

What the Biomechanics Research Actually Says

The primary injury concern for pitchers — at every level — is valgus stress on the medial elbow. This is the outward force that stretches the ulnar collateral ligament with every throw. It is the force behind UCL tears and Tommy John surgery. The question of whether submarine mechanics reduce this stress has been studied, and the findings are more conditional than the coaching folklore suggests.

A 2019 biomechanical analysis published in the American Journal of Sports Medicine compared elbow valgus torque across arm slots from over-the-top to submarine in college-level pitchers. The study found that true submarine deliveries — where the arm is below the horizontal plane of the shoulder at ball release — did produce measurably lower peak elbow valgus torque compared to high three-quarter and over-the-top slots. The reduction was real. It was also modest: roughly 8 to 12 percent in pitchers with well-grooved submarine mechanics.

The critical qualifier is "well-grooved." Pitchers who were in the middle of transitioning to a submarine slot, or who were attempting to force a lower arm angle without the corresponding hip and trunk mechanics, showed increased stress at the shoulder and a significant spike in lumbar spine loading. The arm slot itself was not the variable. The quality and consistency of the entire kinetic chain was.

The key finding most coaches skip over:

Submarine mechanics reduce elbow stress only when the hip drive, trunk tilt, and release point are all working together as a coordinated system. A pitcher who simply drops their arm without changing the rest of their delivery is not pitching submarine — they are pitching over-the-top with a dropped arm, which is one of the worst mechanical combinations for long-term arm health.

The shoulder picture is more complicated. While the elbow may benefit from a lower slot, the shoulder — specifically the posterior capsule and the rotator cuff — takes on different loading patterns in a submarine delivery. The extreme internal rotation required at release in a true submarine motion places unique demands on the posterior shoulder structures that over-the-top pitchers simply don’t experience. This is not necessarily dangerous, but it does require specific shoulder strengthening and mobility work that most youth programs are not doing.

The lower back is the third variable. Submarine pitching requires significant lateral trunk tilt to get the arm below the horizontal. This tilt, repeated hundreds of times per season, creates asymmetrical loading on the lumbar spine. Long-term submariners at the professional level show higher rates of lumbar disc issues than pitchers with more conventional arm slots. For a fourteen-year-old whose spine is still developing, this is not a trivial consideration.

Who Submarine Mechanics Actually Help — and Who They Don’t

The research and the anecdotal evidence from pitching coaches converge on a clear picture of who benefits from a submarine arm slot and who is better served by staying in a more conventional delivery.

Pitchers Who Tend to Benefit

→Natural low-three-quarter arm slot pitchers who are only a small adjustment away from true submarine
→Pitchers with documented UCL laxity who are trying to extend their career without surgery
→Relievers who want a deceptive look against same-handed hitters and can specialize in the role
→Older players (college and above) with fully developed spines and mature hip mechanics

Pitchers Who Should Think Twice

→Youth pitchers under 16 whose spines and hips are still in active development
→Pitchers making the change mid-season under time pressure, without proper mechanical coaching
→High-velocity over-the-top pitchers who would sacrifice significant velo and command in the transition
→Pitchers with existing posterior shoulder tightness or rotator cuff issues

The most important factor is not age, not velocity, and not injury history. It is whether the submarine delivery feels natural or forced. The pitchers who thrive in a submarine slot almost universally describe it as something that felt like it was already in them — the coaching just gave them permission to go there. The pitchers who struggle describe fighting their body every single pitch to stay in a position that doesn’t feel like their own.

That distinction is not just mechanical. It is deeply psychological, and it connects directly to what determines long-term success with any arm-slot change.

The Mental Game of Changing Your Arm Slot

Here is what nobody tells a pitcher when they suggest going submarine: you are not just changing how your arm moves. You are asking a young athlete to discard the motor identity they have spent years building and replace it with something that will feel wrong, slow, and uncomfortable for months before it starts to feel right.

The sports psychology research on motor skill acquisition is unambiguous on this point. When an athlete changes a deeply ingrained movement pattern, they go through a predictable regression before they improve. Performance gets worse before it gets better. For a pitcher who is already dealing with arm soreness and self-doubt, that regression window is psychologically brutal. Many pitchers abandon the transition not because the mechanics weren’t working, but because they couldn’t tolerate the mental discomfort of pitching poorly while the new pattern developed.

The Three Mental Stages of an Arm-Slot Transition

Cognitive Stage (Weeks 1–4)

Every repetition requires conscious thought. The pitcher is thinking about arm angle, hip tilt, release point. Velocity drops. Command is erratic. This is normal and expected. The mental challenge is resisting the urge to abandon the new pattern and retreat to the old one when things go badly in a game situation. Pitchers need explicit permission — from coaches and themselves — to look bad during this window.

Associative Stage (Weeks 4–12)

The pattern starts to feel less foreign. Velocity begins to return. The pitcher can execute the new delivery without thinking about every component. But the old pattern is still competing for control, especially under pressure. A bases-loaded situation in a tournament game is exactly when the nervous system wants to revert to what it knows. This is where visualization work becomes non-negotiable — the pitcher needs thousands of mental reps of the new delivery to make it feel like the default.

Autonomous Stage (Month 3 and beyond)

The new delivery becomes automatic. The pitcher stops thinking about mechanics and starts thinking about execution. Velocity is back, command is consistent, and the arm slot feels like their own. This is when the arm health benefits of the submarine delivery actually materialize — because the mechanics are now clean and consistent rather than forced and variable.

Understanding these stages does not make the transition easy. But it gives pitchers and coaches a framework that prevents premature abandonment of a change that was actually working. The biggest mental training intervention in any arm-slot change is simply knowing that the discomfort of Stage 1 is not a signal to stop — it is a signal that the new neural pathway is being carved.

Building the Mental Framework for a Submarine Transition

If you or your pitcher is making the move to a lower arm slot, the physical work with a qualified pitching coach is essential — but it is not sufficient. Here is the mental training framework that supports a successful transition.

1. Visualization of the New Delivery — Daily

Before physical reps can groove the new pattern, mental reps need to establish it. Every day — not just on throwing days — spend five minutes in a quiet space running through the new delivery in your mind. See the hip tilt. Feel the arm path. Hear the release. Experience the follow-through. The brain builds the motor pathway through imagined repetitions just as it does through physical ones, and mental reps carry zero arm stress.

Critically, visualize the new delivery in pressure situations. Bases loaded. Full count. Tie game. The visualization needs to program the new pattern as your go-to response under stress, not just your warm-up bullpen delivery.

2. Process Goals, Not Outcome Goals

During the transition period, outcome goals — strikeouts, ERA, velocity readings — will work against you. The delivery is not yet optimized, so outcomes will be inconsistent. A pitcher who judges their progress by results during Stage 1 will almost always conclude the transition is failing.

Replace outcome goals with process goals for each bullpen session and each outing. "I will maintain my hip tilt through the release point on at least 80% of my pitches." "I will not revert to my old arm slot when I fall behind in the count." These are measurable, controllable, and actually tell you whether the transition is progressing correctly.

3. Identity Anchoring

One of the most underestimated mental challenges of going submarine is the identity disruption. A pitcher who has identified as a power arm over-the-top guy for six years is not just changing mechanics — they are changing who they are on the mound. That is a genuine psychological loss, and it needs to be acknowledged rather than dismissed.

The most effective mental training intervention here is what sports psychologists call identity anchoring: deliberately constructing a new identity narrative around the submarine delivery before the physical transition is complete. "I am a pitcher who keeps hitters off balance with deception and movement." "I am someone who pitches smart, not just hard." The new identity needs to be something the pitcher actually wants to be, not just a consolation prize for losing velocity.

4. A Consistent Pre-Pitch Routine

During mechanical transitions, the pre-pitch routine becomes a critical anchor. When everything feels unstable and unfamiliar, a consistent routine gives the nervous system a reliable on-ramp to the new delivery. The routine does not need to be elaborate — a breath, a grip reset, a single cue word that calls up the feel of the new arm path — but it needs to be practiced with the same discipline as the physical mechanics.

Research on pre-game routines and anxiety management consistently shows that athletes with structured pre-performance routines maintain more consistent mechanics under pressure than those who rely on feel alone. This effect is amplified during periods of mechanical change, when the feel is unreliable by definition.

The Arm Health Picture: A Balanced Verdict

After examining the biomechanics research, the clinical evidence, and the psychological demands of the transition, here is the most honest answer to whether submarine pitching is better for your arm:

For the right pitcher, done correctly, over sufficient time: yes.

A true submarine delivery with clean mechanics, proper hip engagement, and a fully developed kinetic chain does reduce medial elbow stress compared to over-the-top mechanics. The reduction is real, it is measurable, and it can meaningfully extend a pitcher’s career.

But "done correctly" and "over sufficient time" are doing enormous work in that sentence. A forced, incomplete, or rushed submarine transition does not protect the arm. It redistributes stress to the shoulder and lower back while introducing the mechanical inconsistency that is the single biggest predictor of pitching injuries at every level.

The question parents and coaches should be asking is not "should my pitcher go submarine?" It is "does my pitcher have the physical profile, the mechanical foundation, the coaching support, and the mental training infrastructure to make this transition successfully?" If the honest answer to all four is yes, then the arm health benefits are real and worth pursuing. If any of those four is no, address that gap before changing the arm slot.

The mental training infrastructure piece is the one most consistently overlooked. Physical mechanics can be coached in a bullpen. The identity work, the visualization practice, the pressure-situation programming — those require deliberate mental training that most youth programs are not providing. That gap is where arm-slot transitions fail, and where they succeed.

Apps like Mind & Muscle are built specifically to fill that gap — giving youth pitchers structured mental training tools that work alongside their physical development, not as an afterthought to it. If your pitcher is considering a delivery change, the mental training work should start the day the decision is made, not after the mechanics are already struggling.

Frequently Asked Questions

Frequently asked questions

Research suggests that a true submarine delivery can reduce the valgus stress placed on the elbow compared to an over-the-top slot, because the arm path is more aligned with the plane of the shoulder at release. However, this only holds when the mechanics are clean and consistent. An inconsistent or forced submarine slot can create new stress points at the shoulder and lower back, making mechanics and repetition more important than the slot itself.

Yes, but the transition requires patience and proper coaching. Forcing a submarine slot without building the supporting hip rotation and trunk stability can overload the lower back and lead to new injury patterns. Most sports medicine professionals recommend a gradual transition over an off-season rather than mid-season changes.

The biggest mental hurdle is identity. Most pitchers have spent years building confidence in their natural arm slot. Switching to submarine can feel awkward and unnatural early on, which triggers self-doubt and mechanical overthinking. Building a new mental framework around the new delivery — through visualization and deliberate routine work — is just as important as the physical adjustment.

Initially, yes — most pitchers see a temporary velocity dip during the transition as the new motor pattern develops. Once the mechanics are grooved and hip drive is optimized, many submariners recoup most or all of their previous velocity. Some find that increased hip engagement in the submarine delivery actually adds velocity over time.

The Bottom Line

Submarine pitching is not a shortcut to arm health. It is a mechanical choice that carries genuine benefits for the right pitcher in the right circumstances, and genuine risks for everyone else. The biomechanics are real. The mental demands are real. And the window between "this might work" and "this is actually working" is longer and harder than most coaches prepare their pitchers for.

If you are a pitcher or a parent researching this question because an arm is hurting, the first step is a qualified sports medicine evaluation — not a delivery change. Mechanics do not fix structural problems. If the arm is healthy and the question is about long-term durability, the submarine path is worth a serious conversation with a pitching coach who has actually worked with submariners, not just one who has heard the conventional wisdom.

And if the decision is made to go submarine, start the mental training the same day you start the mechanical work. The two are inseparable. The pitchers who make the transition successfully are not just the ones with the best physical mechanics — they are the ones who built a new identity, a new routine, and a new mental picture of themselves on the mound before the physical delivery was fully grooved. That is the part nobody tells you about. Now you know.

Is Submarine Pitching Better for Your Arm?