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Mike Fast 

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03-15

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6

The BP Wayback Machine: Do Spring Speeds Matter?
by
Mike Fast

01-25

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35

Spinning Yarn: Last Pitch
by
Mike Fast

12-21

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36

Spinning Yarn: Hit-and-Run Success is No Accident
by
Mike Fast

11-22

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30

Spinning Yarn: How Does Quality of Contact Relate to BABIP?
by
Mike Fast

11-16

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41

Spinning Yarn: Who Controls How Hard the Ball is Hit?
by
Mike Fast

10-28

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0

BP Unfiltered: Lowe's Changeup to Freese
by
Mike Fast

10-26

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16

Spinning Yarn: Can We Predict Hot and Cold Zones for Hitters?
by
Mike Fast

10-18

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3

BP Unfiltered: New Pitch Blocking Research
by
Mike Fast

10-08

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7

BP Unfiltered: NLCS Umpire Charts and Data
by
Mike Fast

09-24

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71

Spinning Yarn: Removing the Mask Encore Presentation
by
Mike Fast

09-07

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13

Spinning Yarn: Home Plate Umpire Positioning
by
Mike Fast

08-27

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2

BP Unfiltered: Live Blog PITCHf/x Summit 2011
by
Mike Fast

08-24

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18

BP Unfiltered: Framing Ball Four to Cano
by
Mike Fast

08-22

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4

BP Unfiltered: Jerome Williams Is Back
by
Mike Fast

08-17

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11

Spinning Yarn: Why are Batters Hit by Pitches?
by
Mike Fast

08-06

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0

BP Unfiltered: Where No Counsell Is, the People Fall
by
Mike Fast

08-04

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6

Spinning Yarn: Counsell for the Defense
by
Mike Fast

07-27

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24

BP Unfiltered: Meals Money
by
Mike Fast

07-20

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14

Spinning Yarn: A Zone of Their Own
by
Mike Fast

06-16

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5

BP Unfiltered: A New Screwballer
by
Mike Fast

06-15

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10

Spinning Yarn: Vogelsong Poetry
by
Mike Fast

06-01

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6

Spinning Yarn: The Real Strike Zone, Part 2
by
Mike Fast

05-23

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17

BP Unfiltered: Catcher Interference Leaders
by
Mike Fast

05-11

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15

Spinning Yarn: Speed Traps
by
Mike Fast

04-27

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9

Spinning Yarn: A Soria Subject
by
Mike Fast

04-12

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3

BP Unfiltered: Early PITCHf/x Ballpark Speeds
by
Mike Fast

04-07

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1

BP Unfiltered: In the Beginning...
by
Mike Fast

03-30

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15

Spinning Yarn: Do Spring Speeds Matter?
by
Mike Fast

03-29

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0

BP Unfiltered: Community Playing Time Forecasts
by
Mike Fast

03-20

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4

BP Unfiltered: Pineiro Shoulder Tightness
by
Mike Fast

03-11

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1

BP Unfiltered: You Are the Weekend Links
by
Mike Fast

03-02

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12

Spinning Yarn: How Accurate is PitchTrax?
by
Mike Fast

02-26

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2

BP Unfiltered: Week Links
by
Mike Fast

02-24

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5

BP Unfiltered: Did Wainwright Drop His Arm Angle?
by
Mike Fast

02-23

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11

BP Unfiltered: Do Premier Pitchers Release Within the Zone?
by
Mike Fast

02-16

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59

Spinning Yarn: The Real Strike Zone
by
Mike Fast

02-15

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16

BP Unfiltered: Derek Low
by
Mike Fast

01-19

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3

Spinning Yarn: Rafael Soriano in King Mo's Court
by
Mike Fast

01-04

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2

BP Unfiltered: Mariners Pitcher Release Points
by
Mike Fast

01-03

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2

BP Unfiltered: Phillies Pitcher Release Points
by
Mike Fast

12-20

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0

BP Unfiltered: What does Jeremy Jeffress throw?
by
Mike Fast

12-17

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3

BP Unfiltered: What does Pettitte throw?
by
Mike Fast

12-16

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35

Spinning Yarn: Why The Yankees Need Andy Pettitte
by
Mike Fast

12-09

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16

Spinning Yarn: The Forkball
by
Mike Fast

11-11

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7

Spinning Yarn: Pitcher Release Points
by
Mike Fast

11-02

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1

BP Unfiltered: Hisashi Iwakuma PITCHf/x Scouting Report
by
Mike Fast

10-26

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15

BP Unfiltered: More Thoughts on Robo-Umps
by
Mike Fast

10-26

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8

Spinning Yarn: Interpreting Pitch Classifications
by
Mike Fast

10-23

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11

BP Unfiltered: PitchTrax Wrong, Not Ump
by
Mike Fast

10-14

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20

Spinning Yarn: The Glavine Line
by
Mike Fast

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February 15, 2011 5:58 pm

BP Unfiltered: Derek Low

16

Mike Fast

Average pitch locations for starting pitchers 2007-2010 against left-handed and right-handed batters

As part of the research for an article about the strike zone, scheduled to run tomorrow, I collected information on each pitcher's average pitch location when the pitches crossed the front of home plate. Last night on Twitter, Josh Smolow mentioned that he was writing an article about Derek Lowe and how he's an outlier in terms of least pitches in the strike zone.  That's because Lowe pitches at the bottom edge of the zone, moreso than any other starting pitcher.

Read the full article...

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January 19, 2011 12:00 pm

Spinning Yarn: Rafael Soriano in King Mo's Court

3

Mike Fast

With the addition of Soriano, the Yankees have another hurler with a strong cut fastball.

Rafael Soriano has a reputation as a power arm out of the bullpen. For example, Bob Klapisch recently remarked about pairing Soriano’s “power fastballs” with Mariano Rivera’s “historic cutters.” However, as we'll soon see, the repertoires of the two pitchers actually have much in common.

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Game-to-game fastball release point history for pitchers on the Seattle Mariners roster this offseason

In November, we published an article about using PITCHf/x data to track pitcher fastball release points over time. The article included several examples of pitchers who had interesting changes in their release points or were especially consistent or inconsistent in their release points from game to game.

Read the full article...

Game-to-game release point history for the pitchers on the Phillies roster

In November, we published an article about using PITCHf/x data to track pitcher fastball release points over time. The article included several examples of pitchers who had interesting changes in their release points or were especially consistent or inconsistent in their release points from game to game.

Read the full article...

A look at the repertoire of Jeremy Jeffress using PITCHf/x data

The Royals recently acquired four players for Zack Greinke and Yuniesky Betancourt, among them pitchers Jake Odorizzi and Jeremy Jeffress, who is believed to be the player to be named later.  We don't have any PITCHf/x data for Odorizzi, but Jeffress appeared in 10 games in a September callup with the Brewers and went on to pitch in the Arizona Fall League for the Surprise Rafters.  Since PITCHf/x camera systems are installed at Surprise Stadium and the Peoria Sports Complex, we have PITCHf/x data for six appearances by Jeffress in the AFL.

Read the full article...

A look at Andy Pettitte's pitching repertoire

I recently wrote an article for ESPN Insider about Andy Pettitte's potential role in firming up the Yankee rotation in their competition for the American League East title in 2011.  The Baseball Prospectus version of the article is here.  There was some material on Pettitte's pitching repertoire that didn't have room in that article, but I thought it might be of interest to readers, so I'm publishing it separately here.

Read the full article...

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December 16, 2010 4:00 pm

Spinning Yarn: Why The Yankees Need Andy Pettitte

35

Mike Fast

A look at PitchF/X data illustrates how important it is to the Bronx Bombers that the left-hander put off retirement for at least one more year.

Three out of the last four years, the American League pennant winner has emerged from the East Division: Boston in 2007, Tampa Bay in 2008, and New York in 2009.  The Red Sox and the Yankees took home World Series championships in 2007 and 2009.  As the Rays cut payroll this offseason, conventional wisdom has focused again on the battle between the Yankees and the Red Sox.

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December 9, 2010 9:00 am

Spinning Yarn: The Forkball

16

Mike Fast

What are some of the distinguishing characters of one of baseball's most unknown pitches?

Forkball pitchers are a rare breed, perhaps even rarer than the elusive knuckleballer.

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PITCHf/x data can shed light on pitchers' throwing mechanics.

Pitcher Release Points

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A brief scouting report on Japanese pitcher Hisashi Iwakuma from PITCHf/x data from the 2009 World Baseball Classic

According to Patrick Newman of NPB Tracker and Larry Stone of the Seattle Times, the Tohoku Rakuten Golden Eagles will make their pitcher Hisashi Iwakuma available to American major league teams through the posting process this month.

Read the full article...

Considering human umpires and proposed technologies to replace them

Perfection is not an attainable goal with any ball-strike detection system.  We're going to fall short whether we use human umpires or technology.  That simple fact sometimes gets lost when discussing balls and strikes.  It's worthwhile to remind ourselves of that up front.

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A closer look at what the various pitch types mean and how to approach pitch classification.

Several of the leading pitchers in this year’s postseason make their living with a cut fastball, most notably Roy Halladay and Mariano Rivera. The list of playoff pitchers who have the cutter as an important pitch in their arsenal, though, is long. It includes Cliff Lee, C.J. Wilson, and Tommy Hunter on the Rangers; Andy Pettitte and Phil Hughes on the Yankees; and Cole Hamels on the Phillies.

Read the full article...

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