Isolated Power
In baseball, Isolated Power or ISO is a sabermetric computation used to measure a batter's raw power. One 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 can only be attained by hitting a home run in every at-bat.
The term "Isolated Power" was coined by Bill James, but the concept dates back to Branch Rickey and his statistician Allan Roth.
