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John Hirschbeck

Umpire John Hirschbeck Favored Cubs in Game Three

Ian York uses PITCHf/x and his unique charts to determine if John Hirschbeck called an even game behind the plate in Game Three of the World Series.

In Case You Missed It

The Always Changing Strike Zone

Umpires expand or contract the always changing strike zone. Examining PITCHf/x data, Ian York visualizes how big the zone gets 3-0 and how small it is 0-2.

Has the Strike Zone Expanded?

Has the strike zone expanded in Major League Baseball? Ian York uses his unique charts and PITCHf/x to answer the question.

Rulebook 101: Climbing the Walls

Brandon Magee explains why climbing the walls can be acceptable behavior from time to time, using a play by Anthony Rizzo as an example.

Pitches and Stuff: Two-Seam Fastball

The two-seam fastball is thrown at the same speed as the four-seam fastball, but it can have a very distinct break. Mike Richmond explores why.

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Umpire Strike Zone Changes

Year-to-Year Umpire Strike Zone Changes

Ian York compiled the umpire strike zone changes over the PITCHf/x era of all umpires who pitches 30 games in any one year.
Most Improved Pitches

Most Improved Pitches from the 2016 Season

Ian York uses total bases per 100 pitches to determine the most and least improved pitches from the 2016 season.
Fastball Value

Change in Fastball Value: 2016 Edition

Ian York determines the change in fastball value from 2015 to 2016 using total bases per 100 pitches and offers a ranking of all pitchers from MLB.
Slider Value

Change in Slider Value: 2016 Edition

Ian York determines the change in slider value from 2015 to 2016 using total bases per 100 pitches and offers a ranking of all pitchers from MLB.
Curveball Value

Change in Curveball Value: 2016 Edition

Ian York determines the change in curveball value from 2015 to 2016 using total bases per 100 pitches and offers a ranking of all pitchers from MLB.