Over at Sacrifice Bunt, Melvin wrote a post on Khalil Greene yesterday. That prompted, believe it or not, yet another debate about Greene over at Ducksnorts. As usual, the debate was productive and informative. I’m not going to rehash the whole thing again, but I am going to try to put some of my thoughts into words here, as I’ve been thinking about Greene (again) of late. As always, translating my thoughts into words is always a risky proposition, so correct me if I mess something up or stop reading right now for your own sanity.
Ability vs. Talent
For a great article on this turn to, as usual, Patriot. This is really an issue that I think could possibly clear up a lot of disagreement, or at least allow people to understand what they disagreeing about (and if not … well, I just feel like writing about it).
If you’re trying to measure a player’s ability, you want to remove him from his context completely. That is, you want to remove Greene, at least theoretically, out of Petco and put him in some neutral park. So to actually adjust for this, you want to use component based park factors (like for doubles, hr’s, k’s, etc.), rather than the usual run based factors. What you’re trying to do here, I believe, is estimate the player’s actual ability in a context-neutral situation. So why is this relevant with Khalil Greene?
Well, there’s been a lot of talk lately about Greene and Petco Park. Basically, people are saying things like, “Greene may be hurt by his home park more than any other player.” I’ve said things like that myself, even though I’m not sure if it’s actually true. Here are Greene’s career splits so far (close to 1,100 PA’s at home and on the road):
Home: .228/.288/.370
Road: .280/.335/.515
For a little context, here’s what the Padres did as a team last year:
Home: .235/.310/.378
Road: .265/.333/.440
That is obviously a pretty big split, but it’s no where near Greene’s.
Let’s set randomness aside, and say that Greene really is hurt more by Petco than other players. Let’s say, for example, he has a tendency for hitting long, high fly balls that get hung up in the thick air of San Diego and fall for outs, rather than home runs. A normal hitter, with a more normal distribution of balls in play, will not be hurt as badly by Petco. Note that I’m not really sure this is the case with Greene, I’m just using it to (try to) eventually make my point.
Okay, so about that point … what does this mean? Well, I think it means that if we moved Greene to a completely neutral park, he may very well hit like he’s hit on the road throughout his career. Then, what does that mean? To me, it means that he has more value in a trade than his overall numbers would suggest. Say, if the Braves wanted to deal for him … they don’t care what his line would be for 81 games in Petco and 81 games in road parks. They want to know what it’d be for 81 games in Atlanta and 81 games in road parks.
What does it mean for the Padres? Well, it means that, like I said, they should be able to get more for Greene in, say, a trade because of it. He’s worth more than his numbers, even when park adjusted (with a runs based factor). But, and I think this is the important part, in terms of resigning Greene, they obviously have to consider the context. The fact is, they are going to play half of their games in Petco, and unless they move the fences in where many of Greene’s long flies go, he’s still going to struggle at home.
My point here (and hopefully it’s at least somewhat clear and on the mark) is that although it’s nice to say, for example, that Greene would be a stud in a neutral type park, it really doesn’t matter to the Padres if they decide to keep him. They don’t play in a neutral park. They play in a park that hurts offense a lot, and may just hurt Khalil Greene more than it hurts the average player.
Khalil for MVP
Mr. Greene won the Padres team MVP the other day. I’m not particularly interested in who won the award, but I do like to think a little about the thought process. Anyway, I’m of the opinion that for things like MVP, something like WPA (that’s Win Probability Added) should be used, although I could certainly be swayed. The question you want to ask is what are you trying to measure? Ability? No, I don’t think so, not for most valuable player. Value? Well, yes, but what kind of value? Stats like VORP and basic linear weights ignore context, at least as far as runners on base and the certain “clutch” nature of an at bat. In many cases this is preferable. Since we know that clutch ability doesn’t really exist, at least to a large degree, then we don’t really want to measure a player’s clutch ability if we’re trying to measure their performance going forward. A double in the first inning with the bases empty is worth just as much as a double in the 9th with the bases load, down by two. A double is a double.
However, if you want to measure value, in a backwards looking way, then I think something like WPA is more appropriate. You could also probably use something like Win Shares, as that also has a clutch component and is a somewhat related stat (and there are other similar stats). But, for simplicity, let’s stick with WPA for now.
Greene was -.51 in WPA last year. He was actually very un-clutch by fan graphs’ clutchiness stat (-1.10). Now, just for completeness, let’s say he was +10 runs defensively and he gets +5 for position. We’ve got him at like 10 runs above average or 30 above replacement (these numbers should be relatively close, but they’re just for illustration only, and definitely not exact).
Now, to make it fun, let’s say pitchers can’t win the award. So Greene’s competition is Adrian Gonzalez. Gonzalez’s WPA was 4.07. His clutchiness was 1.84! That doesn’t matter much going forward (surprise, he was negative in the clutch in 05 and 06), but for something like this, (I think) it should be considered. Just for fun, let’s only give him +3 for fielding and -10 for position. 33 runs above average or about 53 above replacement. By my very crude calculations, it looks like Gonzalez should have ran away with that award.
WPA for fielding
You could of course say that if you’re going to use a WPA approach for offense, then you should use one for defense, as well (for MVP’s). I would say that is correct, but I haven’t seen much discussion or research into this area. I am guessing that’s largely due to the fact that people aren’t that interested in it, and it would probably be a lot of work. But I’m sure there are some players who have clutch fielding years. That is, they make a lot of big plays when the game is on the line (or a lot of runners are on base), and perhaps don’t do as well in less critical spots. None of the fielding stats out there attempt to correct for this because they’re much more interested in a true talent measurement, and things like clutch fielding are probably only going to get into the way. But, yeah, for the MVP I do think that theoretically this would be the way to go.
So, there you have it. A long rambling post about something, I guess. A lot of words. Bad writing. Little substance. That’s the Friar Forecast. Until next time ….
By the way, I’m surprised Derek Jeter fans don’t go to a clutch fielding argument more often. Like … yeah, he sucks in the first inning but he turns it on when it counts … these stupid defensive stats don’t account for that, and therefore they’re intentionally biased toward Jeter. Did you see The Play! WPA fielding, baby!