Research

Using Pitch Speed to Tweak Hard-Hit Rate by Alex Chamberlain June 16, 2021 On May 17, Chicago White Sox legend Yermín Mercedes hit the sixth home run of his stellar, albeit wilting, nevertheless unlikely, rookie campaign. A mammoth blast over the center field wall of Target Field, the home run sparked — in equal parts,
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On Max Scherzer and Saving Velocity by Owen McGrattan June 11, 2021 With the continual increases in league-wide fastball velocity each year, we’re beginning to understand that pitcher aging curves are going to change dramatically. As Jeff Zimmerman’s work makes clear, older pitchers are holding onto more of their fastball velocity and shedding usage at
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On Pitch Sequences and Spin Mirroring by Carmen Ciardiello June 8, 2021 With the adoption of the Hawk-Eye tracking system before the 2020 season, analysts and fans alike can directly measure the orientation of the baseball’s spin axis as it heads towards the pitcher. Previously the readings we would see on Baseball Savant were based
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The Perks of a Rangy First Baseman by Luke Hooper June 4, 2021 Last week at Baseball Prospectus, Rob Arthur looked at the rise of advanced defensive positioning since 2015. It turns out that every position has started playing deeper, but — perhaps unsurprisingly — first basemen have moved the least of all. As Arthur
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Checking in on the Hitter’s Count by Owen McGrattan May 28, 2021 There is a lot to dissect when it comes to understanding the increase in strikeouts in baseball. Pitchers at the plate are striking out at a higher clip than ever, but even when filtering out their plate appearances, we’re still seeing yearly increases
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Pitcher zStats at the Quarter-Mark by Dan Szymborski May 21, 2021 Not everyone is interested in projecting the future, but one common thread in much of modern analytics in this regard is the attempt to describe a volatile thing, such as a play in baseball, using something less volatile, such as an underlying ability. This
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Where Did the Homers Go? by Devan Fink May 7, 2021 On Monday, I examined the new baseball’s impact on April home run totals. In sum, home runs were down in April 2021 compared to April 2019, with the home run per batted ball rate dropping by roughly 0.45 percentage points, a figure that would
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Are Relievers Wilder Upon Entry? by Ben Clemens May 7, 2021 On Wednesday afternoon, Liam Hendriks entered a tough situation. There were two outs in the bottom of the ninth, but his margin for error was nonexistent. The bases were loaded, and the White Sox were locked in a tie game. One hiccup in command,
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