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Mark Beuerman's avatar

Great post, thanks for the work in this.

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will's avatar

Stoeten, curious why you are looking at average EV. And I think you've mentioned Max EV in other posts. Neither are, as I understand it, good stats. But don't take my word for it. Here's Ben Clemens:

https://blogs.fangraphs.com/you-cant-fake-exit-velocity/

"In a given year, 15.8% of batters see their average exit velocity improve or decline by at least a standard deviation. It’s a noisy statistic, in other words; you might think that you can tell the difference between two hitters based on their average exit velocities, but there’s a decent chance that you’re being deceived by variance. Hitters change their average exit velocities by a whole standard deviation four times as frequently as they change their top-end power. One year’s data point could easily be a mirage."

"maximum exit velocity is too noisy; 13% of hitters changed theirs by at least a standard deviation from year to year. I think that’s a measurement issue, as it’s easier to crush one batted ball than to crush enough to move up your 95th-percentile mark."

Finally, is average EV and Max EV the loud tools that have you and Nick intrigued by Barger's potential? Davy Andrews went through different exit velo stats to try and figure out which might be the best at predicting future performance of young players based on small sample sizes.

https://blogs.fangraphs.com/the-doomed-search-for-a-perfect-way-to-interpret-exit-velocity-data/

Interesting read, and he settled on Best Speed, which is categorized as EV50 on Statcast's "Exit Velocity & Barrels Leaderboard." Andrews notes that the average Best Speed / EV50 is about 100mph. Barger's Best Speed/EV50 was 100.6mph in 2024 after 149 batted balls.

https://baseballsavant.mlb.com/leaderboard/statcast?type=batter&year=2024&position=&team=141&min=100&sort=avg_best_speed&sortDir=desc

This year, he's up to 102.5 but after just 27 batted balls. Last summer I got real bored (was I was supposed to watch the Jays limp along?) and crunched the numbers to try and recreate Andrews's research. Think I managed it. But most importantly, I think the standard deviation for Best Speed / EV50 is 2.4mph, with the average actually 99.6 mph. So if Barger can keep this up, that's a real improvement and make him an above average hitter when he makes contact. But big if since as Andrews notes:

"Best speed[/EV50] also tends to be sticky from year to year. There have been 1,080 cases where a player had at least 100 tracked batted balls in two consecutive years, and those players have changed their best speed by more than one standard deviation just 6.6% of the time."

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