Thursday, December 20, 2012

Converting RZR, OOZ to Runs for Shortstops

In previous posts, I looked at the Revised Zone Rating (RZR) and Out-of-Zone Plays (OOZ) metrics listed at FanGraphs.  Links to these posts are provided below:
Now, I'm going to to do the above conversion for shortstops.  Table 1 below contains the following information for 22 MLB shortstops with 800 or more innings in 2012:
  • Inn = Innings
  • RZR = Revised Zone Rating
  • OOZ = Out-of-Zone Plays
  • PIZAA =  Plays in Zone Above Average
  • OOZAA = Out-of-Zone Plays Above Average
  • PMAA = Total Plays Above Average
  • RSAA = Runs Saved Above Average
The MLB leader was Orioles shortstop J.J. Hardy with +33 RSAA.  Brendan Ryan of Mariners was second at +21.  The worst shortstops according to this measure were Jimmy Rollins of the Phillies, Derek Jeter of the Yankees and Alcides Escobar of the Royals, all with -16. Tigers shortstop Jhonny Peralta is 15th at -3 RSAA.

Intuitively, the list makes quite a bit of sense for the most part.  One surprise is Escobar, who has a reputation as a strong fielder.  He ranked especially low on plays made in the zone where he was last at -19.  This is not the only defensive statistic which rates him poorly though.  He was also -12 on Baseball Prospectus' Fielding Runs Above Average and -12 on Ultimate Zone Rating.  

Table 1: Runs Saved by MLB Shortstops According to RZR, OOZ, 2012

Player
Team
Inn
RZR
OOZ
PIZ AA
OOZ AA
PMAA
RSAA
J.J. Hardy
BAL
1,439
.833
109
13
31
44
33
Brendan Ryan
SEA
1,170
.816
87
4
24
28
21
Mike Aviles
BOS
1,107
.839
71
11
11
22
16
Yunel Escobar
TOR
1,250
.846
72
16
4
20
15
Alexei Ramirez
CHW
1,392
.837
77
13
2
15
11
Elvis Andrus
TEX
1,333
.811
83
3
11
14
10
Everth Cabrera
SDP
915
.814
58
3
9
12
9
Asdrubal Cabrera
CLE
1,161
.792
77
-3
14
11
8
Zack Cozart
CIN
1,163
.824
66
7
3
10
7
Clint Barmes
PIT
1,159
.832
61
11
-2
9
7
Cliff Pennington
OAK
805
.840
42
9
-2
7
5
Rafael Furcal
STL
1,034
.777
67
-8
11
3
2
Starlin Castro
CHC
1,402
.779
88
-9
12
3
2
Brandon Crawford
SFG
1,101
.830
49
10
-11
-0
-0
Jhonny Peralta
DET
1,277
.853
49
16
-20
-4
-3
Ian Desmond
WSN
1,139
.855
40
14
-22
-7
-6
Erick Aybar
LAA
1,189
.793
57
-3
-7
-10
-8
Ruben Tejada
NYM
964
.830
33
7
-19
-12
-9
Jose Reyes
MIA
1,410
.805
56
1
-20
-19
-14
Alcides Escobar
KCR
1,379
.750
73
-19
-2
-21
-16
Derek Jeter
NYY
1,186
.747
61
-18
-3
-21
-16
Jimmy Rollins
PHI
1,364
.815
48
5
-26
-21
-16
 Data source: FanGraphs.com




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