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08-30-2012, 06:01 PM #21Member Rookie
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And when you discuss a position player all you bring up Nelson is crappy OPS and then have the nerve to rip on WAR as a good indicator of performance. WAR is a much better indicator ask Keith Law for a not super crazy advanced stat to judge value.
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08-30-2012, 07:22 PM #22Senior Member All-Star
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08-30-2012, 08:32 PM #23
Let me ask you this: do you trust UZR in partial-season samples? If you do, you're not using it right. If not, what reason is there to trust fWAR – a metric heavily influenced by UZR – in partial season samples?
Also, focusing on any numbers he's posting this season overlooks the realities of his situation that are going to weigh heavily on any general manager's mind, namely the significant durability issues.
Also, does the fact that Mauer will catch only ~75 games this year have more to do with the fact that the Twins are out of contention, or the fact that the last time he caught 100-plus games he broke down? I don't think you can say one or the other with confidence.
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08-30-2012, 08:50 PM #24Senior Member All-Star
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I think the reason that Mauer is DH'ing has to do with the fact that the primary DH can play catcher and Mauer won't get beat up as much. If the Twins had a Kubel type player at DH and were winning then I would expect to see Mauer behind the plate more.
The only thing that scares me about Mauer is that the end of the contract will likely be a poor value. But that's true of pretty much all of the mega contracts that get signed. At some point you have to commit money to stars.
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08-30-2012, 09:00 PM #25
For anyone who hasn't read it yet, a great article on the Mauer contract by one of my favorite writers:
http://www.sportsonearth.com/article/37609880
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08-30-2012, 09:51 PM #26
I think it's even worse than that. Unless I'm mistaken and it's changed, UZR doesn't even attempt to assign a defensive value to catchers. It's too hard. So fWAR just gives all catchers the same number generic UZR number to use in it's WAR calculations.
Few serious saber folks pay much attention to WAR any more. It's on it's way to joining Win Shares in history's junkpile of attempts at an "uberstat."
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08-30-2012, 10:10 PM #27Senior Member Big-Leaguer
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08-30-2012, 10:13 PM #28Senior Member Big-Leaguer
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I was hoping your first response (saying it was surprising that the formula didn't take that into account) was kind of sarcastic . Maybe it was. That you have had to go back to it because it didn't sink in is kind of amusing to me. And kind of sad. I'm not really surprised that presenting actual facts has been virtually unacknowledged, though.
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08-30-2012, 10:21 PM #29Senior Member Triple-A
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FanGraphs does a similar apportionment:
The position adjustments are then scaled to match the games played at each position for a particular player. This way, players that spend time at multiple positions get a hybrid adjustment based on their playing time at the respective spots.
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08-30-2012, 10:25 PM #30
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08-30-2012, 10:32 PM #31Senior Member All-Star
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Except that Fangraphs ranks Mauer #13 in American League WAR rankings, while Baseball Reference rates him as #34 overall. Mauer's slash numbers are very, very pedestrian-to-mediocre as a non-catcher (DH/1B/PH): 268/356/364, which lends one to think that FG overweights his C positional adjustment in their valuation model.
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08-30-2012, 10:37 PM #32Senior Member Big-Leaguer
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08-31-2012, 01:55 AM #33
I stand corrected.
Fangraphs does not use UZR to calculate a catcher's fWAR. It can't, since there still is no UZR data compiled for catchers.
However, they have changed their methodology. In place of the UZR they use for every other defensive position, they substitute "Stolen Base Runs Runs Saved" (a DRS methodology that attempts to give credit/blame to catchers and pitchers for stolen base attempts) and "Runs saved from Pass Pitches" (an attempt to use an algorithm to determine which catchers are best at blocking balls in the dirt).
So...yes. fWAR does not include UZR data for catchers. It has, however, been modified since I last looked into it to include some estimates of 2 aspects of catcher defense.
You can decide for yourself if two estimators, of two parts of catcher defense, is a valid way to determine who's the most valuable players in MLB.
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08-31-2012, 09:11 AM #34Member Rookie
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Few serious saber folks pay much attention to WAR any more. It's on it's way to joining Win Shares in history's junkpile of attempts at an "uberstat."- USAFChief
Well maybe saber nerds hate it now because its mainstream. Its an accepted stat, ESPN just added it to its stats, that's huge. Its everywhere and effective.
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08-31-2012, 09:52 AM #35



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