February 2026
Pro Bat Measurement
Bats measured with purpose-built hardware.
"It's been a long time since I've been myself."
— Dustin Pedroia, 2019
Career WAR by season · Hand/wrist injury years
Dustin Pedroia's career arc is a case study in cumulative hand and wrist damage. An MVP-caliber player who absorbed thousands of bat impacts across a decade — and the wood was never once measured for how much vibration it was transmitting.
Every bat degrades. Impact compresses wood fibers. Damping properties shift. A bat that felt right on Monday transmits measurably more vibration by Friday. Over a season, over a career — that exposure accumulates in the bones and soft tissue of a player's hands.
THE MECHANISM
1
Impact compresses wood grain
Micro-structural changes from repeated ball contact
2
Damping properties degrade
The bat transmits more vibration to the hands per swing
3
Exposure accumulates
Over weeks and months, cumulative load builds on joints and tendons
4
Nobody is measuring it
There is no system tracking bat health or vibration exposure
Marcelo Mayer has already had two wrist surgeries.
He's 23.
The question isn't whether vibration exposure matters.
The question is why nobody is measuring it.
About LumberListener
LumberListener is an acoustic analysis system for professional wooden baseball bats. A test that can be done anywhere in seconds captures vibration data that reveals the bat's structural fingerprint — resonant frequencies determined by wood grain, density, and physical integrity.
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