Then I happen to be out on MinnPost.com and notice that Aaron Gleeman is writing there again, and that somehow he's come to exactly the opposite conclusion I have: Twins pick worst option: benching Carlos Gomez in favor of Delmon Young.
It's been a while since I've had the opportunity to pick one of Gleeman's essays apart, and it would make sense that this one, which is so dramatically opposed to my own thinking, would be an obvious place to start up again. Sadly, the experience wasn't nearly as enjoyable as I'd hoped -- by the end of Gleeman's essay, I became convinced that Gleeman, just as any other run-of-the-mill sportswriter, has simply decided to start from his conclusion and grab whatever facts he can muster to fit his existing opinion.
Gleeman makes three big errors in interpreting his data, each of which leads him to his flawed conclusion that somehow Carlos Gomez would help the Twins more by being a starter than Delmon Young is. Let's look at each of them, illustrated with a snippet from Gleeman's own essay.
1. Missing the context of Young's versus Gomez's offensive numbers.
Young is a better hitter than Gomez right now, but the gap isn't anywhere close to as big as their batting averages suggest and pales in comparison to the gap defensively. Last year, Young hit .290/.336/.405 and Gomez hit .258/.296/.360. This season, Young is at .288/.333/.338 and Gomez is at .218/.259/.327. In both cases the difference is about 80 points of OPS, and even that figure is inflated by not accounting for Young's propensity to ground into double plays or Gomez's superior speed on the bases.
Gleeman is correct to note that the differences between Young's and Gomez's numbers, both from last year and this year, add up to about 80 points of OPS (on-base plus slugging). However, Gleeman seems to dismiss two additional observations:
- The difference between Gomez and Young is currently about 80 points of OPS, of which 70 of that is simply on-base percentage, which was not the case last year.
On-base percentage is actually significantly more valuable to an offense than slugging percentage -- slugging percentage merely gives you the expectation of bases per plate appearance, while on-base percentage gives you an indication of how often the player will be on base, which is also an indication of how often the player will not be contributing toward ending the inning. Estimates of the value of on-base percentage as a component of OPS have suggested that each point of on-base percentage is worth anywhere from 1.5 to 3 points of slugging average (more likely closer to 1.5) when it comes to how much that player's offense contributes to team offensive success.
Gleeman's assertion that the difference between Young and Gomez offensively based on 80 points of OPS is about fifteen runs is simply unsupported by the observation that almost all that difference is in on-base percentage. Some studies have shown that a mere 20 point difference in on-base percentage without any other change is worth anywhere from eight to ten runs in a season depending on batting order position, so a difference of 70 points would clearly be significantly larger. This of course assumes something fairly major as well: that both players will continue to hit at about this same level, which leads to the next observation.
- Young is closer to his 2008 numbers than Gomez is to his, and thus from a 'likely to improve' perspective, Young has to be seen as being farther ahead.
The question is, given these players' current production, how likely is is that one or the other will have improved by the end of the season? Well, given that Young is basically hitting at his batting average and OBP from last year, while Gomez is behind in both by about 40 points, there's reason to suspect that Young is ahead of Gomez. Young is much farther behind his previous season's power production than Gomez is, but is that really significant? Only if you assume that Young can't hit anything but a single the rest of the year, simply because he's hit almost nothing but singles thus far.
Think of it this way -- if Young's 'true level of ability' for 2009 were to be above his 2008 numbers, you'd expect him to be hitting somewhere above his 2008 numbers; it's not impossible for him to be hitting less than that, because that's how statistics work sometimes, but seeing him hitting about the same in BA and OBP terms would lead you to believe that he's either about the same player he was last year, or that he's struggling a bit (see drastically low SLG) and might pick things up. It's also possible that his 'true level of ability' is below his 2008 numbers, but then you'd expect his BA and OBP to be farther down than they are right now. Meanwhile, if Gomez's 'true level of ability' were above his 2008 numbers, you'd likewise expect to see him hitting at or about those numbers or a little better -- that he's hitting so far below those numbers means that he's either in a deep slump, or that estimations of his 'true level of ability' as higher than his 2008 numbers are simply false.
Put another way, if Delmon Young hits the way he's been hitting for a month and a half, and simply has a few extra balls find the gap along the way, his power numbers will approach his 2008 power numbers without having to do anything differently or improve at all -- if Young does actually improve, then his numbers will go up even more rapidly. Meanwhile, Carlos Gomez would have to improve his batting average by 40 points (which would also increase his OBP and SLG by 40 points each) just to get back to where he was last year, then try to improve still further. If Gomez keeps hitting the way he has since early April, he'll be the worst offensive player in baseball by the end of the season.
Oh, yeah, and the crack about double plays? That also comes from a lack of understanding context -- Young has hit 28 times with a runner on first base and has hit into 5 double plays. Gomez hasn't hit into any double plays, and his speed is certainly part of that, but just as significant is that he's only hit with 11 runners on first base, giving him far fewer opportunities. (See baseball-reference.com's player game logs, though by the time you look, these numbers will likely be different.)
Oh, yeah, and Young has 13 RBI in 78 PAs with runners on (versus a league-average 10 RBI in those situations with the same number of PAs and just three fewer baserunners), so if Young was really a clutch choker, you'd expect to see it in those numbers, wouldn't you?
2. Taking too small a sample of both Young's and Gomez's defensive numbers.
According to Ultimate Zone Rating as a duo Gomez in center field and Span in left field (or right field) has been 30 to 35 runs above average per 150 games. Meanwhile, as a duo, Span in center field and Young in left field has been 45 to 50 runs below average per 150 games.
The latter total is inflated by Span's unsustainably horrible numbers in limited action as a center fielder, but even if you ignore them to give him credit for being exactly average in center field — which at this point is far from a safe assumption — the Young-Span alignment is 40 to 50 runs worse than the Span-Gomez alignment.
It's not clear precisely what numbers Gleeman is using here, since his link simply goes to the page that says 'Hey, UZR is available on Fangraphs!", but we covered Young's abysmal 2008 defensive numbers in a previous essay, and came to the conclusion that Young wasn't as bad as those numbers given his much better defensive numbers as a younger Devil Ray, and that his numbers should improve both with further exposure to the Dome's unique fielding challenges as well as with the upcoming move to an outdoor home park.
To make things even more confusing, how do you parse these two statements?
Gomez is one of the elite defensive center fielders in baseball, saving the Twins a tremendous number of runs with his glove. His presence in center field also means that Span slides over to left field, where he's also one of the elite defenders in the game.
The latter total is inflated by Span's unsustainably horrible numbers in limited action as a center fielder, but even if you ignore them to give him credit for being exactly average in center field — which at this point is far from a safe assumption
So which is it? Is Denard Span one of the elite defensive left fielders in baseball, or is it far from a safe assumption to say he's even average defensively in center? The truth is almost certainly somewhere in the middle -- Span is a solid defensive centerfielder whose limited numbers look worse than they should due to small sample sizes plus inherent limitations in UZR (which are beyond the scope of this essay), while Young is a below-average defensive left fielder whose numbers also look worse then they are.
Now all of this analysis thus far has seemed to show that playing Gomez over Young would be more useful to the Twins right now, given that Gleeman is presuming that replacing Young with Gomez would be worth somewhere in the vicinity of 25-35 runs (or about 2-4 wins). But Gleeman doesn't stop there.
3. Presuming that Gomez and Young have the same potential upside
In the short term, benching Gomez for Young is costing the Twins a significant number of runs, but the move could have even costlier ramifications long term. Gomez is six months from his 24th birthday and has great athletic ability, world-class speed and little idea what he's doing at the plate. While with the Mets he was rushed through the minor leagues, playing at Double-A as a 20-year-old and debuting in the majors as a 21-year-old after all of 36 games at Triple-A.
Gomez was rushed through the normal development process for a prospect, getting promoted to the majors far sooner than his minor-league performance warranted and then sticking in the big leagues at least in part because he was the centerpiece of a franchise-altering trade. Certainly none of that has helped him mature as a player, but compounding those mistakes by now relegating him to the bench makes even less sense.
Young was born just a few months before Gomez in 1985 and also would benefit from regular playing time, which certainly makes juggling outfielders difficult for Gardenhire.
Pretty much everything you need to know about Gleeman's opinion can be summed up in this passage -- two paragraphs about Gomez's youth and minor-league experience, followed up by one sentence that casually mentions that Young is "just a few months" older than Gomez. We've covered this distinction in detail before, so I'll just repeat the key points rather than cut-and-paste the entire essay:
- The point of Bill James's observation about youth is not just to be in the big leagues at a young age, but to be in the big leagues and to demonstrate you belong offensively at a young age. The younger you do this, the higher your ceiling.
- Delmon Young's ceiling is still legitimately the Hall of Fame, given his comp list.
- Carlos Gomez's ceiling is not just far short of the Hall of Fame, but probably that of a regular starter for just a handful of years, again given his comp list.
Here are two minor-league seasons, both players age 20:
A - .281/773; .350 OBP; 24 2B, 8 3B, 7 HR; 53 R in 486 PA
B - .316/814; .341 OBP; 22 2B, 4 3B, 8 HR; 50 R in 370 PA
You'd say player B, despite the fewer PAs, was probably the better prospect, right? You'd be further justified in that opinion when learning that player A racked up his numbers in AA, while player B's season was at AAA, wouldn't you?
Now consider -- player A is Carlos Gomez's best season as a minor leaguer with at least 250 PAs, while player B is Delmon Young's worst season as a minor leaguer with at least 250 PAs.
Tell me again why Gomez is supposed to be the better prospect?
The one observation that Gleeman makes with respect to Gomez that I'd be inclined to agree with is this one:
However, even if you're convinced that Young is the superior player right now and benching Gomez doesn't hurt the team in the short term, why in the world would you want your incredibly raw 23-year-old center fielder getting one or two starts per week?
If the Twins aren't going to play Gomez, they ought to at least let him continue to develop at Triple-A.
Of course, the answer to Gleeman's question is simple: if the Twins' brain trust has decided that, in fact, Gomez's ceiling is limited, and the best that can be hoped for is a solid defensive sub, then keeping Gomez on the major league roster makes perfect sense. After all, championship teams have had defensive specialists since the earliest days of the game, and Gomez has a better chance of helping the team win games as a glove off the bench in the late innings than proving his 'AAAA player' status in Rochester for a second straight year. You may not care for that answer if you're convinced, now that Phil Humber is gone and Deolis Guerra is still some years away from contributing, that Gomez has to be the justification talent-wise for the Twins' trade of Johan Santana to the Mets.
If you truly believe that, then I will finish with the same observation I made in the Shadow Twins segment regarding Young: there is no sane universe in which Carlos Gomez has more upside than does Delmon Young. Period. What that means for the Santana trade, I leave to others to lament.