If you're trying to project future performance, sure. But if you're just talking about what kind of year a player had, isn't this pretty relevant? "Player X struggled the whole year to convert RISP to RBIs, it was out of the ordinary and probably not an indicator of future performance, but it's what happened in 2010 and it hurt the team so Player X gets a B." I don't know, it just seems like a perfectly fine criticism to factor into a season evaluation. To another point in the thread, I think there are many aspects of the game where stats can't tell the story -- one of which is referenced just a few posts up. Someone looked at Prince's OBP with RISP and speculated that maybe he wasn't getting good pitches, thus the low BA/SLG in that situation. It's not fair having to speculate on this, and that's probably all we can really do without watching game tape of every Prince at bat from the season to see if he missed more hittable pitches than years past. (And hey, maybe the beat writers have a better mental game tape than most of us? Maybe not, but maybe....) If there's a "good pitches to hit not taken advantage of by the batter" stat out there, I'm not aware of it. I imagine it would have flaws, too. I think base running, especially first-to-third, is probably another example. If a player has X number of Runs, how do you measure how many more he could have had with better speed and/or instincts that would have put him on third instead of second? Or a player turning a single into a double to avoid a double-play on the ensuing grounder? Or a player who goes to bat in sac fly situations and plates that run with sacrifices vs someone who swings through a couple good pitches and doesn't plate the run. Or a player who's batting with a runner on second and successfully keeps the ball on the right side of the field vs one who does the same thing on the left side of the field? Or, how the speed of the runner on first and the threat of the steal affects the pitcher. For that matter, how the protection the batter gets by who's on deck actually impacts his numbers beyond his actual ability. There might be some holes in my examples, but I don't think it'd be difficult to come up with a healthy list of baseball nuances that stats don't fully explain. I'm sure the day will come where a few comprehensive statistics can summarize every single aspect of value a baseball player has, normalized and adjusted for all factors, but I don't think that day is here yet.