Comments on: UZR on FanGraphs

By: redsox

redsox — Mon, 21 Dec 2009 17:15:09 +0000

Thank you, good answer. Jacoby Ellsbury I am told is a bad fielder because he has terrible range and bad routes. The bad route, slow pick up I can see, but the range? The man, side to side can cover all but the left and right field lines. If he reaches it, it is caught.

Does a minus uzr actually mean he is bad? Is there some Bell curve to say that says if you reach this number you are bad.Adam Dunn -40, Ellsbury -18?

By: Dave Cameron

Dave Cameron — Mon, 21 Dec 2009 16:11:23 +0000

No, quantity of opportunities are included in the calculation.

By: redsox

redsox — Mon, 21 Dec 2009 15:44:27 +0000

Trying to figure out the UZR.

Lets say a club has a fly ball pitching staff leaving little for the infield to do. Using UZR, are all the infielders going to have a bad UZR because they do not see or get to the average number of balls?

By: Dave R

Dave R — Sun, 22 Nov 2009 01:39:15 +0000

Who said Utley was a poor second baseman with no range?

By: rickeysays

rickeysays — Sun, 22 Nov 2009 01:13:33 +0000

Just an observation: So I am led to believe that Chase Utley, a guy with a rep as a poor 2nd baseman with no range, is actually the BEST 2nd baseman with great range? This is just one of many questionable things that jump out at me from these ratings. I’d say theres a flaw in the logic.

By: Kincaid

Kincaid — Sun, 15 Nov 2009 17:33:05 +0000

Does anyone believe David Wright is the 8th best hitting third baseman in the game, as he ranks in wRAA? Or that Grady Sizemore is the 15th best hitting center fielder?

UZR does not say that Tulo is the 18th best fielding shortstop in the game. That is simply where it places the value of his fielding this season. Before you can know what it says about who is better than whom, you would need a projection for UZR, which would include multiple years of data and some regression.

By: Jim

Jim — Sat, 14 Nov 2009 19:40:20 +0000

Does anyone really believe Tulowitizki is th 18th best fielding SS in the game as UZR states he is? If so, I suggest whoever DOES believe this watch some Rockies games…He and Wilson are the best Fielding SS in the game.

By: Bearskin Rugburn

Bearskin Rugburn — Mon, 08 Dec 2008 21:24:51 +0000

So awesome thank you David, MGL, and the rest of the crew.

Quick question. Does UZR use a hypothetical standard for the average fielder at each position or is it an average of current players, somewhat like Dewan’s +/-?

And another quick question. In looking at the team defensive stats does UZR/150 represent the average defensive value of a single player on that team or that team’s aggregate defensive ability over that season?

By: Jerry

Jerry — Mon, 08 Dec 2008 21:03:22 +0000

Much thanks to everyone involved… You’ve succeeded in making a great site even greater! As a Mariners fan, the first site I check is the USS Mariner…but the second is always FanGraphs. Keep up the excellent work, gentlemen.

By: obsessivegiantscompulsive

obsessivegiantscompulsive — Mon, 08 Dec 2008 18:51:11 +0000

Yes, this is great news and great data to have.

Will we ever see any split data in the stats section?