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Originally Posted by ALB123
Thanks for explaining ISO.
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The main advantage to ISO over SLG is that SLG folds in OBP. You'll get some weird sluggers if you just look at SLG. Absolutely wRC and wRC+ are the way to go. With, as I said, OBP and ISO to get more detail.
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I've been noticing, and I'll admit it's a small sample size, when looking at Hitter's Ratings (not power guys) for great hitters of the era like Tony Gwynn, Wade Boggs, Willie Wilson, Paul Molitor these guys all have really, really good to great Contact Ratings which I expect. What I didn't expect is their Eye/Discipline Rating is going to be low. Very low in some cases. I wonder why that is.
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Eye rating is tied directly to walks.
Boggs walked a ton. I'd expect him to have a high rating
Gwynn didn't walk much, he should be lower
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For fielding, I had a feeling someone was going to mention Zone Rating. I gotta look it up - I have no idea what it truly is - but I see that statistic appearing in a lot of conversations about player fielding ability.
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Cliff's notes.
Divides the field in to zones. With players responsible for different zones. Different plays are easier or harder. Players get credit both for plays they did or didn't make.
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Someone on Reddit suggested UBR / BsR - mentioning it's something about base running. I thought that was pretty cool.
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Also mentioned it, didn't.
It keeps track of when players take extra bases or fail to take extra bases.
One of the big "revolutions" of advanced stats is converting plays to runs.
The old argument of who's better the bat-first or glove-first SS are easier to answer now.
We know, to a high degree of certainty, how many runs (fractions of a run) a walk, a single, a double, a triple, a home run, a hit by pitch, reaching on error, a stolen base, a caught stealing a defensive play, etc are worth.
And we can add up all the plays a player makes to see how many runs they produced. Then convert those runs to wins (WAR) No, it's not perfect, but it's very good.
One thing to do is see which metrics count runs. Batting average doesn't count runs, neither do RBI, ERA or runs. But nor do wRC+ or FIP-. Some that do: UZR, UBR, and wRC (note the lack of the "-").
On that note any stat with a "+" or "-" means it has been adjusted to account for the things like stadiums (think Coors vs PETCO) and compares to league average for that season (think 1900 vs 2000)
Enjoy the ride