Batting Average is the worst offensive statistic in baseball

Twins Video
As a kid, I remember looking at batting average as the key to the value of a player. OK, not every player, as I was a Harmon Killebrew fan, and he never really hit for average. That should have alerted me to the fact that not all base hits are created equal - and those that sail over the fences are far more valuable than a single to center field.
There are a lot of people who complain about trading away last year's AL batting champion, Louis Arreaz. That said, while he hits for a very high average, just how impactful is he? I would argue not that impactful.
Let's compare two players so far this year - and they are night and day difference makers. Introducing Joey Gallo.
Gallo is an all or nothing player offensively. He strikes out a lot, but when he gets hit, he hits the ball hard. Many of those get out of the ballpark or at least produce extra base hits.
Arraez is the oppposite - he doesn't really hit the ball hard, but he gets a lot of base hits. Through tonight, his batting average is a gaudy .379. By contrast, Gallo is at .209.
So who is more effective? I would argue it is about a wash, and, given the many more at bats for Arraez, Gallo is more impactful
In 132 at bats, Arraez has scored just 14 runs. That is largely because it takes a lot to score a run when you just hit a single or walk, and that is what Arraez mostly does. With 132 at bats, Arraez' 50 hits are mostly singles (7 doubles, 1 triple, 1 home run), so his OPS is.905. That's pretty good, but remember the runs scored thing.
In just 86 at bats, Gallo has scored 16 runs, and has a similar .903 OPS. The difference is he drives the ball - he has 18 hits, and nearly all are extra base hits (5 doubles, 1 triple, and 8 home runs). So Gallo is hitting .209, and Arraez is hitting .379 - but the impact factors in baseball suggest Gallo has been more valuable offensively.
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