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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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Do his early-season struggles suggest that Royals closer Joakim Soria's best days lie behind him, or can he succeed with a different style?

Joakim Soria has been one of the best relief pitchers in baseball over the past four years. From 2007 to 2010, he put up a 2.01 ERA with 281 strikeouts against only 70 walks and 182 hits in 255 innings. Over that period, he held the opposition scoreless in 82 percent of the games he entered, and he allowed multiple runs only five percent of the time. For comparison, Mariano Rivera had a 2.05 ERA over those four years, held the opposition scoreless 83 percent of the time, and allowed multiple runs five percent of the time. Even while fighting (and usually failing) to avoid the basement in the AL Central, the Royals could claim a truly elite closer in Soria, the rare All-Star on a perennial cellar dweller.

Read the full article...

A quick check on the PITCHf/x speed calibrations in the first two weeks of 2011

Several people have asked me about the accuracy of the speeds reported by PITCHf/x systems around the major leagues in the early going. I usually wait about a month into the season before I run checks on the calibrations of the PITCHf/x camera systems installed in all the major league ballparks. We need a sample size of 10-20 games before we can be really confident that we are evaluating the cameras and not just the specific set of pitchers that have played in a given stadium or the weather they have been playing in. In my full set of PITCHf/x accuracy checks, I adjust for those things in order to improve the estimates.

Read the full article...

Examining season-starting losing streaks

I had been thinking about losing streaks to start a season, and Colin's post this morning sent me researching (and then sent Colin researching as he helped me identify the teams listed in this post.)

Read the full article...

Mike examines whether velocity changes in March and April can reveal whether the radar gun will be a pitcher's friend or foe throughout the season.

Fastball speed in the major leagues is an important and oft-researched topic. As the 2011 season begins, the trickle of reports on pitchers’ fastball speeds that came out of spring training will turn into a flood of data. Some pitchers will be throwing a little faster than they were last year, while others will have lost a notch on their hard stuff.

Read the full article...

Tango's community playing time forecasts for 2011

Tom Tango is doing his annual community-sourced playing time forecasts again this year. Go fill out the survey for your favorite team here.

Read the full article...

Leading indicators of the Pineiro shoulder injury in his fastball speed data from March 15

I'd look a lot more prescient if I'd posted this five days ago. The data was there, but I didn't have confidence it. Apparently, I should have.

Read the full article...

A summary of some of the best sabermetric articles from the preceding couple weeks

After Neftali Feliz threw three strong innings on Wednesday, Jeff Passan made a convincing argument that Feliz belongs as a starter. It's good stuff from Jeff as always, with interesting quotes sprinkled throughout from Rangers pitching coach Mike Maddux and others.

Read the full article...

Before you yell at the umpire, consider making a few adjustments to your dataset.

After the last two postseasons, most baseball fans are familiar with the strike zone location graphic known as PitchTrax. Here’s an example from Game One of the 2010 American League Championship Series:

Read the full article...

February 26, 2011 12:48 pm

BP Unfiltered: Week Links

2

Mike Fast

Articles from around the saber community this week

Max Marchi investigated the accuracy of the PITCHf/x plate location data. Max used a technique similar to mine, and in fact, I have an article planned soon to go into more detail about my method.  Max, however, added a helpful feature, using multilevel modeling.

Read the full article...

Examining Buster Olney's claim that scouts saw Adam Wainwright's arm angle drop down the stretch in 2010

Earlier today, Buster Olney tweeted, "A couple of scouts say this: they saw Wainwright's arm angle dropping down the stretch last year, a sign of trouble."

Read the full article...

Evaluating Rick Peterson's claim that premier pitchers release the ball within the horizontal dimensions of the strike zone

At a recent promotional event for the Bloomberg Sports Front Office 2011 professional product, Rick Peterson analyzed the mechanics of John Axford and discussed how he helped Axford move toward the center of the rubber to improve his results in 2010. You can see a video of the Bloomberg event here, courtesy of Kerel Cooper.

Read the full article...

Examining umpire calling and catcher framing leads to thought-provoking questions about the amorphous nature of the strike zone.

Ever since the PITCHf/x system debuted in the 2006 playoffs, people have been interested in what it says about the strike zone that the umpires call.

Read the full article...

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