
🔥 Why the Tommy John Epidemic Continues to Spike
- two12performance
- Jun 11
- 2 min read
The Tommy John epidemic in baseball has skyrocketed from 1 in 7 pitchers 15 years ago, to now 1 in 3
Many things have been blamed: the overall emphasis on velocity; greater horizontal ball movement (sweeper/splinker popularity); even the pitch clock
While some of those may have validity, the research pins two major catalysts:
➡️ Pitching more than 100 innings in a year increases injury risk 3x
➡️ Pitching more than 8 months out of the year increases injury risk 5x
The key word in the injury data is “pitching”. The reason is pitching is such a catalyst is that fundamentally pitching off a mound is the greatest stress to the arm, as it forces the arm into greater external rotation than otherwise.
Unfortunately, the money machine that is camps, showcases and club ball doesn’t allow for kids to get an offseason from pitching.
And sadly, nowadays many pros also never get a true offseason. Throwing off a mound continues year round, as big name facilities give out throwing programs built around the constraints of the facility itself-so much of the throwing happens off a mound.
The reality is velocity IS required. You’re not going to advance in the sport without it.
The good news though is a gaining velo doesn’t have to come with injury. We’ve had college pitchers go from 81, to 92; 78, to 91; and pro pitchers gain 5mph in an offseason, all without the mound. Velocity can be gained without sacrificing arm health in the process
Unfortunately, until players, parents, and facilities accept the injury data and come up with better solutions than the current “no offseason” model, the Tommy John epidemic will only continue to spike
-Fenske
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