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Isolated Power or ISO is a sabermetrics baseball statistic which aims to measure a batter's raw power. The formula is slugging percentage minus batting average. The final result measures how many extra bases a player averages per at bat. A player who hits only singles would thus have an ISO of 0. The maximum ISO is 3.000, and could only be attained by hitting a home run in every at-bat. Power hitters ordinarily have an ISO between .240 and .300.
See also