Chase Headley is an affordable and versatile switch hitter. He can run, has some power and plays good defense whether it’s at third base or the outfield. He can probably play first base relatively well. He’s not a free agent until after the 2014 season so any team that has him will have him for the foreseeable future at a very reasonable price.

He’s a nice player. He’s a pretty good player.

But this posting on MLB Trade Rumors implies, based on Fangraphs’ version of Wins Above Replacement (WAR), that he’s something more than a pretty good player. It says specifically that Headley is the 13th most valuable position player in baseball.

This exemplifies a problem with WAR. It gives information that may or may not be accurate, relevant or in the proper context.

Does value equal worth?

In other words, it may be accurate that Headley is that good in this framework, but is it true? Is it fair?

Based on fWAR, yes Headley was the 13th “most valuable” player in baseball. (He’s dropped since the posting.)

But salary aside, would you rather have Headley instead of some of the players currently behind him in the list? Headley instead of Carlos Beltran? Instead of Brett Lawrie? Mark Trumbo? Jose Bautista? Joe Mauer?

Headley might hit for more power if he was in a friendlier home park, but don’t expect him to suddenly morph from what he is—10-12 homers a year—into Asdrubal Cabrera and have a wondrous jump in power to 25 homers.

Looking at other Padres’ players who’ve gone on to play in fairer parks—Adrian Gonzalez, Kevin Kouzmanoff and Mike Cameron—their power numbers have been the same or worse.

When in PetCo Park, the pitchers are aware of how difficult it is to hit a home run; that Headley hits a lot of balls up the middle which make it harder for him to hit home runs. They’re more likely to feed him pitches they wouldn’t if he were playing in a smaller park.

The dimensions of the park are static; the pitching strategy is variable.

Not unlike the oft-repeated and woefully inaccurate lament that if X player wasn’t caught stealing prior to Y player’s home run they would’ve had 2 runs rather than 1, it’s not taking into account that the entire pitching sequence would’ve been different and might’ve yielded an entirely different result.

It’s indicative of a lack of in-the-trenches knowledge to take fWAR—or any stat for that matter—at face value. Similar to those who said they’d stay away from Yu Darvish or Aroldis Chapman because of prior failures with Japanese and Cuban free agents; or the concept that because a tall catcher like Mauer has never made it as a star player then he’s not going to be a star player; or the Moneyball farce that college pitchers are a better option than high school pitchers, it’s a false “proof” based on floating principles that remove experience and baseball sense from the decisionmaking process.

Stats are important but not the final word. If you take seriously the idea that Headley is the 13th most valuable position player in baseball and judge him on that, quite bluntly, you don’t know anything about baseball and need to learn before putting your opinion out there as final. And if you knowingly twist the facts, that makes it worse because instead of full disclosure—statistical and otherwise—in spite of the possibility of them watering down your argument, you’re spiritually altering them to “prove” a nonexistent point. That’s not honesty. It’s agenda-driven and self-interested at the expense of the truth.

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