The Rule (a) The official scorer shall credit the batter with a run batted in for every run that scores: (1) unaided by an error and as part of a play begun by the batter's safe hit (including the batter's home run), sacrifice bunt, sacrifice fly, infield out or fielder's choice, unless Rule 10.04 applies; (2) by reason of the batter becoming a runner with the bases full (because of a base on balls, an award of first base for being touched by a pitched ball or for interference or obstruction); or (3) when, before two are out, an error is made on a play on which a runner from third base ordinarily would score. The official scorer shall not credit a run batted in (1) when the batter grounds into a force double play or a reverse-force double play; or (2) when a fielder is charged with an error because the fielder muffs a throw at first base that would have completed a force double play. © The official scorer's judgment must determine whether a run batted in shall be credited for a run that scores when a fielder holds the ball or throws to a wrong base. Ordinarily, if the runner keeps going, the official scorer should credit a run batted in; if the runner stops and takes off again when the runner notices the misplay, the official scorer should credit the run as scored on a fielder's choice. TL;DR When you find it in the rulebook how to define WAR, then you would be correct. As to then there is a clear definition as to what MUST constitute an RBI or a HR. FIP, WAR, xFIP are all more useful then an RBI. That does not make them a fact. That has all I've been arguing. You seem to be on a bend to make it sound as if I hate advanced stats.