That's the thing with using RBI totals to evaluate a player, though - it's not useful on its own merits. Stats like EqA, OPS, OPS+, even OBP and SLG, can be used on their own merit and be at least moderately useful. A stat like RBI cannot stand on its own and tell you much of anything useful or, especially, predictive. For instance, if I tell you player A has 25 RBI this season, that doesn't mean a whole lot. Maybe he's only had 30 guys on base in front of him. Or maybe he's had 150 guys on in front of him. RBI alone doesn't tell us much. However, if I tell you player A has an OPS of 1.105, you know for a fact he's been highly productive in some fashion. Just the same if a player has a .310 EqA, you know he's been very good. That's the issue many people have with using RBI as an evaluator. It doesn't tell you much on its own.