Introduction to new stats

[Jeffy25]

I am sticking a thread for those that want to post about a stat that they have learned about, or is a new stat that they find interesting.

Do your best to explain in complete, and be able to answer questions for the stat.


I learned about this stat a few years ago, but it's still useful, and really it is under utilized when discussing teams defenses, and how it might impact a pitcher.


Defensive efficiency.


You can find each teams defensive efficiency ratings by going to
baseball-reference.com
then select seasons
2012 mlb
then under fielding, sort by DefEff

In 2012, league average was .691

This is very simply. The number of outs on balls in play that a team converted into outs.

This is subject to fluctuations by pitchers that give up stronger contact vs weaker contact.

But it's also a sign of how well a team plays defensively vs another.


An example is when someone says Justin Verlander had worse defense than Jered Weaver, thus the ERA differences


Well DefEff
League average is .691
Angels led baseball with a .708
Tigers were 5th to last with a .678

So there might be some truth to that accusation.


Anyway, additional tool to use to help find more information

[Dekker]

I like it. Great thread

[Jeffy25]

I would like to introduce my own personally created statistic

Net Runs Totaled

wRC+DRS+positional adjustment+BSR

Everything can be found on Fangraphs

wRC
Is the weighted Runs Created by a player (can be found under advanced batting)

DRS
Defensive Runs Saved (can be found under advanced fielding)

Positional Adjustment
Per 162 games played - so if they play half a season, weigh it based on number of games played at said position, and value each. If a player plays 81 games in LF, and 81 games at 1B, then you would take the average between the two.
Here are the positional adjustment totals
Catcher: +12.5 runs (all are per 162 defensive games)
First Base: -12.5 runs
Second Base: +2.5 runs
Third Base: +2.5 runs
Shortstop: +7.5 runs
Left Field: -7.5 runs
Center Field: +2.5 runs
Right Field: -7.5 runs
Designated Hitter: -17.5 runs

BSR
Just Base Running Runs created
Under any baseball players page on fangraphs, it's the base running score


So an example from this season would be
Austin Jackson
RC: 97
DRS: 5
PA: 2.5
BSR: 1.2
= 105.7

Prince
RC: 124
DRS: -4
PA: -12.5
BSR: -5.9
= 101.6


Gives another snap shot at player value across positions like WAR, and provides additional information

[Jeffy25]

OppQual


It's under baseball-reference during Spring Training.

It shows the quality level that a hitter for example has been facing vs pitchers.

Example:

Oscar Taveras has a 8.4 right now

10 - MLB
8 - AAA
7 - AA
5 - High A
4 - Full Season A
1.5 - 3 - Rookie Ball
1 - Opposition is a batter not even a pitcher lol.

http://www.sports-reference.com/blog...ition-measure/

[metswon69]

Does it apex at 10?

Or does it distinguish the quality of major league hitters or pitchers pass that number?

[Jeffy25]

Appears to apex

[catman]

Interesting way to look at things. I like it.