Jacob Hirsh
@jhirsh04
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Everyday is an opportunity // UTRGV Baseball Alumni // Hitting Coordinator @DrivelineBB
Seattle, WA
Joined December 2013
‼️Thread‼️ Julio Rodriguez put together one of the best debut seasons we’ve seen over the past decade. However, his sophomore season has been underwhelming…Let’s dive into why this may be happening 👀
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That’ll play @CooperWhitton
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From early success with the Nationals to the Yankees' playoff run, Amed Rosario had a wild 2025. Hitting Coordinator @TravisFitta breaks down the work that made it happen 💪
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weird
"I love every bit of it." @CliffFloyd30 is all in on the analytic focus of improving bat speed after seeing what hitting coach David Popkins has done with the Blue Jays.
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Players over the last 2 Seasons with 70+ XBHs and 80+ SBs (MLB and MiLB): 💪➕⚡️ Jose Ramirez Elly De La Cruz Samad Taylor Henry Bolte Victor Labrada Cole Carrigg Jakob Marsee
Mariners Prospect @VJLabrada1 has stormed through every level of the minors, earning a promotion to Triple-A this past June. After training at Driveline Baseball, he's continued to make strides year after year and now feels ready to compete at the highest level 🚀
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Sophomore Fall highlights at @CCSpokaneBSB. Played great this fall excited for the spring! Contact info (509)-998-2979 Hunterderr17@gmail.com @CoachGrimes16 @PNW_CBR @BUncommitted @scout_rams @jhirsh04
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Good player
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Hitting guys have done a ton of the applied work here. Most notably of course Jason Ochart, now Dir. Hitting @RedSox. But many others. @maxgordon40 @AndrewAydt, @Tstokey, @kww_BOS, @johnsoteropulos, @TravisFitta, @Justin_Sartori. @Elijah_Boyer7, @jhirsh04, and more!
@soundslikeR_E_L @drivelinekyle @jacklambert__ @connerpelletier and others on the Driveline squad have done a ton of great research to quantify how bat speed increases impact offensive production and power output (and how decreases can diminish them).
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Sprint speeds nice. Trotting around the bases? Even better 😎 Jordan Walker getting after it early this offseason alongside @AndrewAydt
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I analyzed 92 MLB hitters whose whiff rates INCREASED from 2024 to 2025. You'd expect worse results, right? Wrong. Their production in the heart of the zone exploded. Here's what the data reveals about modern hitting philosophy 🧵
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Every swing leaves a trail. 📊 At Driveline, we use bat path visuals to track: Bat Speed, Angles, Direction and much more. Why? Because better paths = more barrels. See it. Tweak it. Repeat it.
Offseason progress = feedback loops Capture the full extent of bat path in our #Launchpad and turn it into targeted drills and programming. Train it and track it with @blastmotion daily. Then retest it every 6 weeks! Don’t just chase feel, measure it! @DrivelineBB
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Top 10 team wide power grade rankings (20-80) from the 2025 season 7 out of the top 10 teams made the playoff
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We analyzed 50 MLB hitters who improved their zone contact from 2024→2025. The shocking finding? Making more contact barely moved the needle on production—UNLESS they also increased bat speed. Here's the 7x difference that changes everything 🧵
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⚠️ Losing ~1 MPH of bat speed is a HUGE problem. ⚠️ Compare a star player's xStats if he lost just 1 MPH of bat speed. 7 fewer HR, 11 fewer barrels, 29 points of xwOBAcon lost. 😳 Source: @DrivelineBB MoneyBarrel Script
It's pretty clear that the #SFGiants have a bat speed problem under the current regime. Willy Adames, Jung Hoo Lee, Matt Chapman, and Tyler Fitzgerald all had significant drop-offs, and while it may not seem like a lot, an average decline of almost 1 mph is huge.
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Today's Machine Progression: - Lefty Cutter, Smash Balls (short distance) - Righty Sweeper, Smash Balls (longer distance) - Trajekt Righty Sliders with Leather Smash Balls (full distance) Pro groups are firing in @DrivelineBB AZ 🌵
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Hitting Assessment @DrivelineBB Batted Ball profile ↕️ Bat Path ↕️ Biomech Any adjustment should target either Bat Speed or Bat Path, if not both, & ultimately aim to improve batted ball outcomes More info: https://t.co/nMXDHIJjnU
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