Grit is a mostly qualitative trait that is, more or less, very hard to quantify. Yet it is interesting that a characteristic that may be the easiest for scouts to identify "right of the bat," could be a daunting task to quantify. Often it is used by those who oppose the use of sabermetrics to value a player; in fact, most often it is their strongest argument. "Well, who cares about WAR when my eyes tell me, he's got grit - he has the IT factor?"
Beyond The Boxscore