275:, etc.) if he were hitting in another league at the same level. Additionally, in general the level of competition at the PCL is lower than that in the Majors, so a hitter in the PCL would likely have lesser raw statistics in the Majors. EqA is thus useful to strip certain illusions from the surface of players' raw statistics.
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This spring, we at BP have chosen to rebrand EqA as True
Average (abbreviated TAv). Why? Because we feel strongly that the new name underscores our ability to get a 'True-r' grasp on the quality of a hitter than the aforementioned traditional or more modern stats do. Quite frankly, we're hopeful that
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EqA is scaled like a batting average, which is the number of safe hits divided by the number of official at bats. However, Davenport EqA aims to capture not so much hits per at bat but instead "runs produced per at bat". In that sense, EqA is akin to a larger family of run estimators that
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In the formula given in the box above, the abbreviations are: H=Hit, TB=Total bases, BB=Bases on balls (walks), HBP=Hit by pitch, SB=Stolen base, SH=Sacrifice hit (typically, sacrifice bunt), SF=Sacrifice fly, AB=At bat, CS=Caught stealing.
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EqA is a derivative of Raw EqA, or REqA. REqA is (H + TB + 1.5*(BB + HBP + SB) + SH + SF) divided by (AB + BB + HBP + SH + SF + CS + SB). REqA in turn is adjusted to account for league difficulty and scale to create EqA.
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is a minor league known to be a very friendly venue for hitters. Therefore, a hitter in the PCL may have notably depressed raw statistics (a lower batting average, fewer
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and intended to express the production of hitters in a context independent of park and league effects. It represents a hitter's productivity using the same scale as
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The date EqA was invented cannot readily be documented, but references to it were being offered on the rec.sport.baseball
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194:{\displaystyle EqA={\frac {H+TB+{1.5\cdot (BB+HBP)}+SB+SH+SF}{AB+BB+HBP+SH+SF+CS+{\frac {SB}{3}}}}}
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ability. It does this by adjusting a player's raw statistics for park and league effects.
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For this interpretation see Clay
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group as early as
January 14, 1996. Baseball Prospectus renamed it
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this simple, easy-to-remember name can reach a wider audience.
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EqA has been used for several years by the authors of the
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409:. Prospectus Hit and Run. Archived from
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468:"The Book" Blog Commentary on EqA
350:from the original on 2015-06-29
346:. Baseball Prospectus Basics.
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311:Value over replacement player
379:. 1996-01-14. Archived from
369:"The rec.sport.baseball FAQ"
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401:Jaffe, Jay (2010-02-25).
436:Baseball Prospectus 2000
244:Definition and rationale
403:"Call it True Average"
252:EqA is one of several
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296:sabermetricians use.
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269:Pacific Coast League
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407:Baseball Prospectus
344:Baseball Prospectus
306:Total player rating
285:Baseball Prospectus
217:metric invented by
483:Batting statistics
377:rec.sport.baseball
267:For instance, the
207:Equivalent Average
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452:R. Jazayerli
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444:C. Davenport
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415:. Retrieved
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385:. Retrieved
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262:Major League
258:minor league
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234:True Average
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340:"About EqA"
292:forecasts.
254:sabermetric
417:2015-09-07
387:2015-09-07
354:2015-09-07
322:References
316:Win shares
373:Newsgroup
273:home runs
60:⋅
477:Category
440:C. Kahrl
348:Archived
300:See also
215:baseball
375::
213:) is a
450:, and
290:PECOTA
230:usenet
238:TAv
211:EqA
57:1.5
479::
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236:(
209:(
184:3
180:B
177:S
171:+
168:S
165:C
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159:F
156:S
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150:H
147:S
144:+
141:P
138:B
135:H
132:+
129:B
126:B
123:+
120:B
117:A
112:F
109:S
106:+
103:H
100:S
97:+
94:B
91:S
88:+
84:)
81:P
78:B
75:H
72:+
69:B
66:B
63:(
53:+
50:B
47:T
44:+
41:H
35:=
32:A
29:q
26:E
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