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The Stack Softball

Softball is getting faster.
Your swing should too.

Order Today

Advanced Speed Training Made Easy

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Step 1

Open TheStack App

TheStack App builds your custom training program and guides you every step of the way.
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Step 2

Load TheStack Bat

Follow TheStack Baseball app instructions to prepare for your next overload or overspeed set.
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Step 3

Swing Away!

TheStack Bat measures your speed while TheStack Baseball app keeps you on track with built-in rest timers.
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Repeat

Just 2-3 times per week

TheStack Baseball app will schedule your workouts for you, which take just 15-20 minutes to complete!
Everything you need to start training

The Stack Softball Hardware

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Bat Speed Sensor

5 CNC Milled Stack Weights

Tapered Handle with Stack Grip

Threaded Fastener

Bat Speed Sensor

5 CNC Milled Stack Weights

Tapered Handle with Stack Grip

Threaded Fastener

Dynamic Training Programs

Customized variable inertia speed training - the most efficient way to increase your bat speed. The algorithms that power the dynamic programming come from years of research by leading sports scientist, Dr. Sasho MacKenzie.

Your Personal Speed Trainer

Be guided through scheduled workouts while tracking Stack weight, rest, recovery, and performance gains. This information allows future workouts to be adjusted behind the scenes, so your training is optimized to maximize bat speed gains.

Tracking & Sharing Metrics

Track key performance metrics such as Stack Speed, Distance Potential, Bat Speed and Grit Score. Easily share your progress and gains.

Order Now
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+4.5 MPH of Bat Speed

We've tracked over 700,000 swings from our dedicated players, and so far, Stackers who have completed at least 1 program have gained an average of 4.5 MPH of Bat Speed.
TheStack Bat - Includes Integrated Speed Sensor and Award Winning App
TheStack Bat - Includes Integrated Speed Sensor and Award Winning App
TheStack Bat - Includes Integrated Speed Sensor and Award Winning App
TheStack Bat - Includes Integrated Speed Sensor and Award Winning App
TheStack Bat - Includes Integrated Speed Sensor and Award Winning App
TheStack Bat - Includes Integrated Speed Sensor and Award Winning App
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TheStack Bat

  • Speed Trainer
$399.00 $399.00

Increase your bat speed and exit velocity with the #1 training system for bat speed.

Size Pro
In stock
  • Integrated Stack Sensor measures bat speed and sends data to TheStack Baseball app while training
  • No charging required — battery life over 1 year
  • 5 milled Stack weights enable 30 weight combinations between 0g and 400g
  • Customized, responsive speed training formulated by renowned biomechanist Dr. Sasho MacKenzie
  • Guided workout timer for reps, sets, and rest intervals
  • Custom Bat Speed and Distance Potential metrics to track your gains (Learn More)
  • Connect to coaches and other players in TheStack Baseball app
  • TheStack Bat with integrated Stack Sensor (Pro or Youth)
  • Five milled Stack weights
  • Full access to TheStack Baseball app included with purchase — no subscription fees; share hardware amongst your family

Access TheStack Baseball app from the App Store when your order arrives. Requires iOS 15.0 or later.

*Ships to the US only. International customers: please fill out the International Waitlist Form.