Baseball for the Thinking Fan

Login | Register | Feedback

btf_logo
You are here > Home > Baseball Newsstand > Baseball Primer Newsblog > Discussion
Baseball Primer Newsblog
— The Best News Links from the Baseball Newsstand

Saturday, May 25, 2013

Reliever Pitching Metric Correlations, Year-to-Year | FanGraphs Baseball

It makes perfect sense. Starters having more pitches to fall back on. Relievers usually only have one or two good pitches, so the pitcher has less options to make adjustments.

This lines up well with what Jeff Zimmerman and I found regarding pitcher aging and how it differs depending on a pitchers role.

Let’s take the example of strike outs. Jeff and I found that while starting pitchers were able to mitigate against their decline in velocity–and therefore experienced a less drastic decline in their strike out rate–relievers were far more dependent on their velocity. As a result, relievers generally were more likely to see sharper declines in strike out rates from year to year.

Jim Furtado Posted: May 25, 2013 at 10:28 AM | 2 comment(s) Login to Bookmark
  Tags: pitching, sabermetrics

Reader Comments and Retorts

Go to end of page

Statements posted here are those of our readers and do not represent the BaseballThinkFactory. Names are provided by the poster and are not verified. We ask that posters follow our submission policy. Please report any inappropriate comments.

   1. valuearbitrageur Posted: May 25, 2013 at 01:24 PM (#4452001)
Finally an explanation for the rapid decline of Mariano Rivera.

Only 6.x K/9, and has given up almost 4 runs in barely 18 innings
   2. Mike Emeigh Posted: May 25, 2013 at 02:00 PM (#4452022)
If you read the comments, MGL makes an important point:

Without matching up the underlying number of TBF (so that it is the same for starters and relievers), a comparison of correlations is worthless.

As it turns out, if you use the same number of underlying TBF (which is difficult obviously, since relievers max out at around 300 or so), you will find that relievers have a HIGHER correlation than starters. My guess is that their true talent changes less from season to season for a variety of reasons, perhaps one of them being more stable health due to fewer pitches thrown.


Relievers face about 1/3 the number of hitters that starters face, so you would expect more Y-T-Y variability simply because of the smaller samples.

-- MWE

You must be Registered and Logged In to post comments.

 

 

<< Back to main

News

All News | Prime News

Old-School Newsstand


BBTF Partner

Support BBTF

donate

Thanks to
Marc Sully's not booin'. He's Youkin'.
for his generous support.

Bookmarks

You must be logged in to view your Bookmarks.

Hot Topics

NewsblogWould O's fans really hate Bautista if the team signed him? | Sports on Earth
(11 - 12:48am, Dec 09)
Last: Greg K

NewsblogOTP: 5 December 2016: Baseball's New Collective Bargaining Agreement
(1222 - 12:38am, Dec 09)
Last: Greg K

NewsblogOT: NBA 2016-17 Preseason Thread
(1285 - 12:31am, Dec 09)
Last: madvillain

Newsblog2016 Rule 5 Draft results | MLB.com
(32 - 12:29am, Dec 09)
Last: Make Meatwad great again

NewsblogJAYSON STARK ON THE WINTER MEETINGS: “I’M ONLY GOING TO REPORT INFORMATION THAT I AM CONFIDENT ABOUT”
(6 - 12:23am, Dec 09)
Last: Howie Menckel

NewsblogPablo Sandoval got 'complacent' with big Red Sox deal
(24 - 11:03pm, Dec 08)
Last: Captain Supporter

Hall of MeritMost Meritorious Player: 1999 Discussion
(5 - 9:47pm, Dec 08)
Last: DL from MN

NewsblogCards would have to leave comfort zone to land outfielder they desire | stltoday.com
(11 - 9:45pm, Dec 08)
Last: cardsfanboy

NewsblogAstros discuss deal for Jose Quintana, but White Sox want a haul - Houston Chronicle
(12 - 9:38pm, Dec 08)
Last: Walt Davis

NewsblogNationals acquire outfielder Adam Eaton | MLB.com
(59 - 9:22pm, Dec 08)
Last: Los Angeles El Hombre de Anaheim

Gonfalon CubsCubs roster update - post Winter Meetings
(9 - 9:07pm, Dec 08)
Last: What did Billy Ripken have against ElRoy Face?

NewsblogPhillies prospect Mickey Moniak adds 20 pounds of muscle
(58 - 8:50pm, Dec 08)
Last: PreservedFish

NewsblogHoly Toledo! Bill King is Hall of Fame announcer, finally
(16 - 8:24pm, Dec 08)
Last: No.19

NewsblogBlue Jays trying to balance objective evaluation, subjective exuberance - Sportsnet.ca
(9 - 7:37pm, Dec 08)
Last: John Northey

Gonfalon CubsStarting to think about 2017
(107 - 5:33pm, Dec 08)
Last: Moses Taylor, Unwavering Optimist

Page rendered in 0.2698 seconds
47 querie(s) executed