PITCHf/x

This section focuses on all things PITCHf/X

Bullpen workhorses

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Using 70 innings pitched each of the last four years without any starts as our filter, who are the most turned-to bullpen arms?

Did Lester change his release point?

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Anecdotal evidence seemed to suggest that Jon Lester changed his release point in 2013, but does the data back up that claim? What else might be at play in Lester's second half resurgence from last...

Livin' or Dayan?

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Expectations for Dayan Viciedo to be a middle-of-the-lineup power bat were high when the White Sox signed him in 2008; thus far, he has failed to meet them. Could he do it in 2014?

Cliff Lee, Hiroki Kuroda and Avoiding Walks

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We often think of pitchers who have good control and limit walks as ones who throw tons of pitches inside the zone. But, as the contrast between Cliff Lee and Hiroki Kuroda shows, that isn't always...

Pitching (and hitting) backwards in 2013

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Which pitchers threw the most first-pitch breaking balls and offspeed pitches, and which hitters did they throw them to?

The Great Cingrani

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Starters generally need at least two, and often three, good pitches to succeed in the major leagues. But Reds left-hander Tony Cingrani baffled MLB hitters with largely one pitch—a four-seam...

Evaluating Plate Discipline Part Two: Pitchers

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A follow up to last week's Disc Rating, with a focus on pitchers and plate-discipline statistics.

What caused Cliff Lee's renaissance in 2008?

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Taking some old analysis from Mike Fast we can look at what made Cliff Lee's incredible improvement from 2007 to 2008 possible. Lee went from a nobody to the best pitcher in baseball, and we don't...

New Stat: Plate Discipline Rating

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Introducing a new metric -- Disc Rating -- that puts all of the individual categories of plate discipline into one overall rating.

Toward umpire aging curves

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Bryan Cole investigates whether umpires' ability to call balls and strikes gets worse with age.

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