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MLB rule change is affecting pitchers far more than ever expected
TL;DR
MLB's new pitch clock rule is leading to increased arm injuries among pitchers, with notable velocity drops observed. The change has fundamentally altered pitching mechanics and workload.
Key points
- MLB introduced a pitch clock in 2023.
- Pitch clock duration is 15 seconds with no runners, 20 seconds with runners.
- Increased arm injuries among pitchers are being reported.
- Pitching mechanics have been fundamentally altered by the new rules.
- UCL injuries are linked to high-torque stress and fatigue.
MLBSkenes
Friends, Iāve been thinking. And Iāve thought a lot about this, and was reminded watching Skenes velocity dip nearly 2 MPH against the Redbirds on Thursday afternoon. Pitcher arm injuries in MLB have always been a thing. But it feels more prevalent lately, and it certainly seems to be claiming some serious names.
MORE: Mets make puzzling statement about their teams future direction
The Pitch Clock Changed More Than Just Pace
Since 2023, pitchers have been operating under a pitch clockā15 seconds with the bases empty, 20 with runners on, later adjusted to 18 seconds with runners. Major League Baseball got the pace it wanted. But it didnāt just speed up the gameāit fundamentally changed how pitchers work. And now the question is simple:
Are pitchersā arms paying the price? Pitching has always been violent on the body. The UCL doesnāt just fail randomlyāit breaks down from repeated high-torque stress, especially as fatigue builds and mechanics begin to slip. That part hasnāt changed.
What has changed is how quickly pitchers have to reset between those high-stress throws.
Less Recovery, More Strain
With less time between pitches, thereās less opportunity for the arm to recoverāeven in small ways. That brief reset matters:
- The forearm flexor group stabilizes the elbow
- The joint absorbs cumulative stress
- Mechanics get a chance to reset
Take that away, and the strain compounds. Now add:
- Runners on base (more pressure, less time)
- High-leverage pitches
- Longer innings
It becomes easier to see how wear and tear can accelerate.
The Velocity Era Isnāt Helping
Q&A
How has the MLB pitch clock rule affected pitcher performance?
The pitch clock has changed the pace of the game and fundamentally altered how pitchers work, potentially leading to increased arm injuries.
What is the current pitch clock duration for MLB pitchers?
As of 2023, the pitch clock is set to 15 seconds with the bases empty and 20 seconds with runners on, later adjusted to 18 seconds with runners.
Are MLB pitchers experiencing more arm injuries since the rule change?
Yes, there has been a noticeable increase in arm injuries among pitchers, suggesting that the new rules may be impacting their health.
What factors contribute to UCL injuries in MLB pitchers?
UCL injuries often result from repeated high-torque stress on the arm, especially as fatigue builds and pitching mechanics begin to slip.
