Isolated Power
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Isolated Power or ISO is a sabermetrics baseball statistic which measures a batter's raw power through extra bases per at bat.
The formula for ISO is:
ISO = Slugging Percentage - Batting Average
PECOTA uses a different formula which counts doubles the same as triples. It's been shown that extending a double into a triple is more a function of the batter's speed than power.
PECOTA ISO formula:
ISO = (Doubles + Triples + 3*Home Runs) / AB
