⚾ BASEBALL SEASON PREP — GRIP STRENGTH SALE NOW LIVE ⚾

Grip Training Audit

We Tested Every Grip Tool Baseball Players Actually Use. Here's Why 4 of Them Are Incomplete.

By Coach Brian T., Baseball Performance Specialist  |  Last Updated April 15, 2026 · 8 min read

⚾ If you've already tried a gripper, rice bucket, or wrist roller and haven't seen the exit velocity gains you expected — this explains why.

 

Let's be clear upfront: the tools in this article are not bad. Rice buckets have been in baseball dugouts for decades. Spring grippers are in every sporting goods store for a reason. Wrist rollers are a legitimate training implement. The problem isn't that these tools are wrong — it's that they're incomplete. And in baseball, incomplete grip training is the same as no grip training, because the sport demands all four planes of wrist force simultaneously.

 

This is an honest audit. We're going to walk through exactly what each tool trains, what it doesn't, and why the gap between what you're training and what the swing and pitch actually demand is costing you measurable performance. The goal isn't to sell you something. The goal is to show you the gap — and then show you the only tool that closes it.

The Baseball Grip Tool Audit

Tool Flexion Extension Pronation / Supination Endurance Verdict
Spring Gripper ✓ Strong ✗ Not trained ✗ Not trained ◎ Limited reps 1 of 4 — Incomplete
Rice Bucket ✓ Moderate ✓ Moderate ✗ Minimal ◎ Moderate 2 of 4 — Limited
Wrist Roller ✓ Moderate ✗ Not trained ✗ Not trained ✗ Shoulders fatigue first 1 of 4 — Incomplete
Wrist Curls (barbell) ✓ Strong ◎ Partial ✗ Not trained ✗ Requires gym 2 of 4 — Limited
Gripzilla Tornado ★ ✓ Full range ✓ Full range ✓ Full 360° ✓ Adjustable resistance 4 of 4 — Complete ✓

The Audit in One Sentence: Every other tool trains 1 or 2 of the 4 planes the swing and pitch demand. The Tornado trains all 4. Here's the breakdown of exactly why each one falls short 👇

Why This Matters — The 3D Grip Deficit

The Swing and the Pitch Are 3D Movements. Most Grip Training Is 1D.

Every baseball swing involves four simultaneous planes of wrist force: flexion (driving the bat path through the zone), extension (controlling the follow-through), pronation (the rotational release that generates bat speed and pitch spin), and supination (the swing initiation that creates bat lag).

The Gripzilla Tornado's ball-and-socket resistance mechanism is the only training tool that replicates all four planes simultaneously. The internal friction plate creates resistance in every direction of wrist movement — not just the crush direction that spring grippers train, and not just the up-down direction that wrist curls train. Every rep with the Tornado is a full-plane training stimulus. No other tool in this audit comes close.

Tool Audit No. 1

Spring Grippers: Excellent for Crush Strength. Useless for the Swing.

Spring Gripper 1 of 4 planes Incomplete

Spring grippers are the most common grip training tool in baseball. They're cheap, portable, and they do train something real — the flexor muscles of the forearm that close the hand. If your only goal is a stronger handshake, a spring gripper is a perfectly adequate tool.

 

The problem is that the baseball swing is not a handshake. The swing requires the wrists to rotate through approximately 180 degrees of pronation from swing initiation to follow-through. It requires the extensors to fire to control bat path. It requires radial and ulnar deviation to maintain bat lag and then release it through the zone. Spring grippers train exactly one of these four demands.

 

The players who squeeze grippers in the dugout and wonder why their exit velocity isn't moving are experiencing the spring gripper gap. They're getting stronger at the one plane that matters least in the swing, while the three planes that actually drive exit velocity remain untrained.

"I used a hand gripper every day for two years. My grip felt stronger but my exit velo never moved. Then I learned about the 4-plane problem and switched to the Tornado. Six weeks later I was up 6 mph. The gripper was training the wrong thing." — High School Hitter, Texas

Tool Audit No. 2

Rice Buckets: The Most Honest Tool in the Audit — and Still Only Half the Answer

The rice bucket deserves credit. It's been in baseball training rooms for generations, it's genuinely effective for what it trains, and it's the only tool in this audit besides the Tornado that trains more than one plane of motion. Flexion and extension are both addressed. The resistance is low and consistent. For a young player just starting to build forearm awareness, a rice bucket is a legitimate starting point.

 

But the pitch — specifically the curveball, slider, and changeup — demands pronation and supination that rice buckets simply cannot load. The wrist rotation that generates spin rate is a rotational force that rice provides almost no resistance against. A pitcher who trains exclusively with rice buckets is building a foundation in two planes while leaving the two planes that actually determine spin rate and pitch movement completely untrained.

 

The rice bucket gap is most visible in pitchers who lose spin rate and command by the 5th inning. Their flexors and extensors are conditioned. Their rotational endurance — the pronation-supination stamina that maintains pitch quality deep into games — is not.


 

Tool Audit No. 3

Wrist Rollers: The Shoulder Fatigue Problem Nobody Talks About

Wrist rollers are a staple in strength and conditioning programs, and they do train forearm flexion effectively when used correctly. The problem is the body mechanics of the exercise itself: holding a weighted implement at arm's length while rolling it up and down requires significant shoulder and upper arm stabilization. For most players, the shoulders fatigue before the forearms reach meaningful training stimulus.

 

This is the wrist roller paradox — it's marketed as a forearm exercise, but the limiting factor is almost always the shoulder girdle. Players who use wrist rollers regularly often report shoulder fatigue and soreness without a corresponding improvement in grip endurance or bat speed. They're training the wrong muscle group to failure while the forearms remain undertrained.

 

The Tornado eliminates this problem entirely. Because it's held in a neutral, relaxed position with the elbow at the side, the shoulder is not a limiting factor. The resistance is applied directly to the wrist joint in all four planes, and the forearms reach training stimulus on every rep without shoulder involvement.

Reason No. 4

Why the 4-Plane Gap Is the Most Expensive Training Mistake in Baseball

The four planes of wrist force in baseball are not theoretical. They are measurable, trainable, and directly correlated with the performance metrics that scouts and coaches track. Exit velocity is driven by pronation and supination through the zone. Bat path consistency is driven by flexion control. Follow-through and contact quality are driven by extension endurance. Pitch spin rate and late-game command are driven by pronation-supination stamina.

 

When a player trains only one or two of these planes — which is what every tool in this audit except the Tornado does — they are building a grip that is strong in the trained planes and weak in the untrained ones. Under game conditions, the weak planes become the limiting factor. The exit velocity plateaus. The spin rate drops in the 5th inning. The bat slips on inside pitches. The swing feels different in the 7th than it did in the 1st.

 

These are not mechanical problems. They are training gaps. And they are exactly the gaps that the Tornado's ball-and-socket, 4-plane resistance mechanism is designed to close.

The Verdict

The Tornado Is the Only Tool in This Audit That Closes All Four Gaps

The audit is straightforward. Spring grippers train 1 plane. Rice buckets train 2. Wrist rollers train 1 — and fatigue the wrong muscle group first. Wrist curls train 2 and require a gym. The Tornado trains all 4, fits in a bat bag, and can be used anywhere.

 

The ball-and-socket resistance mechanism is the key. Unlike every other tool in this audit, the Tornado's internal friction plate creates resistance in every direction of wrist movement simultaneously. Flexion, extension, pronation, supination — all four planes loaded in every rep. The resistance dial adjusts from Level 2 (appropriate for a 13-year-old starting out) to Level 10 (appropriate for a college or professional-level athlete).

 

If you've already tried the other tools and haven't seen the exit velocity or spin rate gains you expected, this is the explanation. You were training the right body part with the wrong stimulus. The Tornado trains the right body part with the right stimulus — all four planes, every rep, anywhere you train.

"I tried everything — grippers, rice, wrist rollers. None of it moved my exit velo. Switched to the Tornado for one offseason and went from 84 to 91 mph. My coach thought I'd gotten bigger. I hadn't. I'd just finally trained the right thing." — College Hitter, Ohio

4 of 4

Planes of wrist force trained — the only tool in the audit with a complete score

+7 MPH

Average exit velocity gain reported after the 8-week Tornado protocol

Levels 2–10

Adjustable resistance — from 13U travel ball to college and pro-level athletes

⚾ Stop Training Half the Problem

Train All 4 Planes.
Close Every Gap.

The Gripzilla Tornado is the only grip training tool that addresses all four planes of wrist force the swing and pitch demand. Used by hitters and pitchers from travel ball to college programs. Fits in your bat bag. 10 minutes a day. 8 weeks to a measurable difference.

CLAIM 30% OFF — TRAIN THE FULL GRIP

SELL OUT RISK: HIGH  |  FREE SHIPPING

🔒 60-Day Performance Guarantee — If your exit velocity doesn't improve, send it back.

What Travel Ball Families Are Saying

Gripzilla Tornado — 4 of 4 Planes. The Only Complete Grip Tool.

CLAIM 30% OFF — GRIPZILLA DYNAMO