BoxMatrix

TRAIN FOR VELOCITY
BUILD CONTROL

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Marr Strength Featured On

Built for Pitchers. Backed by Proven Training.

BoxMatrix is a structured strength training system built to support velocity, control, and arm health. You’ll train with proven methods used at Marr Strength—plus exclusive shoulder work and monthly in-person guidance.

What You Receive.

Get full access to our online strength training system—plus one in-person training session each month in Southlake, TX for hands-on coaching and guidance.

Best Content

Matrix Essentials

Your foundational starting point
Best Content

Shoulder Matrix (Exclusive)

Protect your arm. Support velocity.
Best Content

Workouts of the Day

Progressed training. Updated daily.
Best Content

Train With Us — Southlake, TX

Hands-on coaching. Real feedback.

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price option MONTHLY
MONTHLY

$35

This subscription will give you unlimited access to all of our content monthly + Gym access to our Southlake location.

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