Peripheral ERA (PERA) is a
pitching statistic created by the
Baseball Prospectus team. It is the expected
earned run average
In baseball statistics, earned run average (ERA) is the average of earned runs allowed by a pitcher per nine innings pitched (i.e. the traditional length of a game). It is determined by dividing the number of earned runs allowed by the number ...
taking into account park-adjusted hits, walks, strikeouts, and home runs allowed. Unlike
Voros McCracken
Robert "Voros" McCracken (born August 17, 1971, Chicago) is an American baseball sabermetrician. "Voros" (vörös in hungarian = red in english) is a nickname from his partial Hungarian heritage. He is widely recognized for his pioneering work on ...
's
DIPS, hits allowed are included. PERA doesn't attempt to eliminate the effect of luck on batted balls away from ERA, instead attempting to account for good (or bad) luck in the combinations of hits, walks, home runs, and strikeouts. A lower PERA than EqERA (adjusted ERA) may indicate poor luck which may even itself out in the future, leading to a lower EqERA despite no change in quality of pitching.
See also
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Baseball statistics
Baseball statistics play an important role in evaluating the progress of a player or team.
Since the flow of a baseball game has natural breaks to it, and normally players act individually rather than performing in clusters, the sport lends itsel ...
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Batting park factor
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Earned run average
In baseball statistics, earned run average (ERA) is the average of earned runs allowed by a pitcher per nine innings pitched (i.e. the traditional length of a game). It is determined by dividing the number of earned runs allowed by the number ...
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QERA
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Sabermetrics
Sabermetrics, or originally SABRmetrics, is the empirical analysis of baseball, especially baseball statistics that measure in-game activity. Sabermetricians collect and summarize the relevant data from this in-game activity to answer specific ques ...
References
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Pitching statistics
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