Adventures in Advanced Baseball Statistics, Part 7: Range Factor
Despite its illustrious name, the Range Factor actually doesn’t have anything to do (directly) with a fielder’s range. Simply put, it is a calculation of the number of assists and put outs that a player makes over the course of several games or innings. The idea is that the number of outs the player is involved in the better he is. This runs contrary to the traditional calculation of cleanly fielded balls determining how good a player is (see Errors).
However, as I said earlier, this has little to do with range, as first basemen generally are involved with more outs than other players. And they never move, lazy bastards.