Pitching

Pitching is a ridiculous thing when you stop and think about it. It quite literally taxes the human arm to its biological limits, yet demands incredible precision and relentless repetition. As a result, pitchers can be quite fickle commodities and prone to injuries and irregular career paths. Some pitchers don’t figure everything out until they’re past 30 (e.g. Randy Johnson) while others achieve dominance at an early age but are unable to maintain that level (think Scott Kazmir). All these factors makes evaluating pitchers tricky, but there is plenty of exciting work being done these days in this area, especially with Pitch f/x data.

When evaluating a pitcher, rely mostly on the golden trifecta of FIP/xFIP/tERABatted ball data, BABIP, homerun rates, LOB%, and rate statistics are all very important too, though, and can shed light on individual players. Scouting data is invaluable as well, although unfortunately we have very little of this publicly available for use.

Links for Further Reading:

Voros McCracken’s Groundbreaking DIPS Theory – Baseball Prospectus

How Can we Tell if a Pitcher is Any Good? – The Book Blog

Sabermetrics 101: Pitching – Lookout Landing

Evaluating Pitcher Talent – U.S.S. Mariner

The Injury Zone – Hardball Times/Josh Kalk





Steve is the editor-in-chief of DRaysBay and the keeper of the FanGraphs Library. You can follow him on Twitter at @steveslow.

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Sean Severns
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I am trying to find out what PFR, and ERC are in sabermetric stats.

Friedman
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Friedman

PFR (Power/finesse ratio) = (K + BB)/IP

ERC = Component ERA. Too lazy to type it all but: http://en.wikipedia.org/wiki/Component_ERA

sportsfreak0217
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sportsfreak0217

what does E F stand for

Mark
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Mark

When I click on Glossary, I get this page. It doesn’t look like a Glossary. Where is it hiding really?

Dave
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Dave

I agree. I don’t understand why there is no centralized repository of stat definitions/abbreviations used on this site. Its insane.

Neb
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Neb

Where can I find “PitchFxType” abreviation meanings?

TIA

Gallo
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Gallo

http://www.fangraphs.com/library/index.php/misc/pitch-fx/

FA = fastball
FF = four-seam fastball
FT = two-seam fastball
FC = fastball (cutter)
FS / SI / SF = fastball (sinker, split-fingered)

SL = slider
CH = changeup
CB / CU = curveball
KC = knuckle-curve
KN = knuckleball
EP = eephus

nichove
Member
nichove

Does anybody know where to get 2010 siera projections?