Peripheral ERA (PERA) is a
pitching statistic created by the
Baseball Prospectus
Baseball Prospectus (BP) is an organization that publishes a website, BaseballProspectus.com, devoted to the sabermetric analysis of baseball. BP has a staff of regular columnists and provides advanced statistics as well as player and team perf ...
team. It is the expected
earned run average taking into account park-adjusted hits, walks, strikeouts, and home runs allowed. Unlike
Voros McCracken'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
*
Baseball statistics
*
Batting park factor
*
Earned run average
*
QERA
*
Sabermetrics
References
*
Pitching statistics
{{Baseball-stub