highest k/9 relief pitcher 500 games

Aroldis Chapman has the highest K/9 by a relief pitcher when pitching in 500+ games, with 14.55 per nine innings.

Interpreted as:
highest k/9 relief pitcher 500 or more games
NAMEK/9GWLW%GSERASOCGSHOSVIPHERRHRBBHBPGFIBBTBFWPBB/9K/BBHR/9K%BB%WHIPBABIPRAH/9
1Aroldis Chapman
A. Chapman
14.55
867
60
48
.556
0
2.52
1,334
0
0
369
825.1
477
231
256
54
409
33
566
7
3,356
87
4.46
3.26
0.59
39.7
12.2
1.07
.277
2.79
5.20
2Edwin Díaz
E. Díaz
14.51
524
28
36
.438
0
2.82
844
0
0
256
523.1
357
164
177
54
184
41
399
9
2,121
34
3.16
4.59
0.93
39.8
8.7
1.03
.304
3.04
6.14
3Craig Kimbrel
C. Kimbrel
14.04
851
56
48
.538
0
2.58
1,282
0
0
440
821.2
492
236
263
75
346
40
656
11
3,306
70
3.79
3.71
0.82
38.8
10.5
1.02
.267
2.88
5.39
4Andrew Miller
A. Miller
12.93
546
35
28
.556
0
2.95
724
0
0
63
504.0
351
165
183
47
201
46
147
9
2,091
25
3.59
3.60
0.84
34.6
9.6
1.10
.283
3.27
6.27
5Kenley Jansen
K. Jansen
12.43
937
54
40
.574
0
2.58
1,283
0
0
476
929.0
611
266
285
89
283
32
703
20
3,687
21
2.74
4.53
0.86
34.8
7.7
0.96
.261
2.76
5.92
6Carlos Marmol
C. Marmol
12.33
506
18
29
.383
0
3.25
698
0
0
117
509.1
324
184
195
37
340
47
259
20
2,207
32
6.01
2.05
0.65
31.6
15.4
1.30
.265
3.45
5.73
7Billy Wagner
B. Wagner
11.92
853
47
40
.540
0
2.31
1,196
0
0
422
903.0
601
232
262
82
300
33
703
26
3,600
43
2.99
3.99
0.82
33.2
8.3
1.00
.261
2.61
5.99
8Brad Lidge
B. Lidge
11.92
602
26
32
.448
0
3.55
795
0
0
225
600.1
490
237
257
57
285
33
368
41
2,576
46
4.27
2.79
0.85
30.9
11.1
1.29
.308
3.85
7.35
9David Robertson
D. Robertson
11.84
880
68
46
.596
0
2.93
1,175
0
0
179
893.1
674
291
315
81
364
25
358
38
3,687
57
3.67
3.23
0.82
31.9
9.9
1.16
.290
3.17
6.79
10Jake Diekman
J. Diekman
11.42
705
27
34
.443
0
3.91
764
0
0
19
602.1
483
262
312
53
358
47
141
21
2,662
44
5.35
2.13
0.79
28.7
13.4
1.40
.299
4.66
7.22
11Octavio Dotel
O. Dotel
11.31
724
50
41
.549
0
3.32
955
0
0
109
760.0
576
280
306
84
313
31
305
36
3,172
40
3.71
3.05
0.99
30.1
9.9
1.17
.275
3.62
6.82
12Greg Holland
G. Holland
11.13
556
30
28
.517
0
3.14
677
0
0
220
547.2
417
191
211
43
241
7
355
20
2,271
50
3.96
2.81
0.71
29.8
10.6
1.20
.287
3.47
6.85
13Héctor Neris
H. Neris
11.12
643
46
43
.517
0
3.47
775
0
0
107
627.1
509
242
272
83
243
36
274
16
2,632
38
3.49
3.19
1.19
29.4
9.2
1.20
.285
3.90
7.30
14Ugueth Urbina
U. Urbina
11.03
562
36
42
.462
0
3.24
718
0
0
237
585.2
427
211
225
65
255
5
408
26
2,425
25
3.92
2.82
1.00
29.6
10.5
1.16
.262
3.46
6.56
15Will Smith
W. Smith
11.02
601
27
35
.435
0
3.58
684
0
0
113
558.2
452
222
253
71
204
16
237
25
2,312
26
3.29
3.35
1.14
29.6
8.8
1.17
.285
4.08
7.28
16Brad Boxberger
B. Boxberger
10.95
506
31
38
.449
0
3.50
581
0
0
84
477.2
372
186
204
63
233
23
167
17
2,021
16
4.39
2.49
1.19
28.7
11.5
1.27
.276
3.84
7.01
17Armando Benitez
A. Benitez
10.93
762
40
47
.460
0
3.13
946
0
0
289
779.0
545
271
296
95
403
16
527
32
3,253
18
4.66
2.35
1.10
29.1
12.4
1.22
.251
3.42
6.30
18Raisel Iglesias
R. Iglesias
10.75
583
38
47
.447
0
2.72
740
0
0
254
619.1
463
187
212
68
168
20
462
17
2,474
16
2.44
4.40
0.99
29.9
6.8
1.02
.267
3.08
6.73
19Oliver Perez
O. Perez
10.59
508
16
27
.372
0
3.74
433
0
0
5
368.0
336
153
172
35
148
35
84
25
1,598
18
3.62
2.93
0.86
27.1
9.3
1.32
.318
4.21
8.22
20Brad Hand
B. Hand
10.59
536
32
31
.508
0
3.31
647
0
0
132
550.0
439
202
230
51
206
41
254
23
2,293
25
3.37
3.14
0.83
28.2
9.0
1.17
.288
3.76
7.18
21Francisco Rodriguez
F. Rodriguez
10.53
948
52
53
.495
0
2.86
1,142
0
0
437
976.0
738
310
336
98
389
17
677
42
4,011
68
3.59
2.94
0.90
28.5
9.7
1.15
.271
3.10
6.81
22Adam Ottavino
A. Ottavino
10.51
724
41
41
.500
0
3.40
853
0
0
46
730.1
609
276
296
68
322
50
168
31
3,098
65
3.97
2.65
0.84
27.5
10.4
1.27
.300
3.65
7.50
23B.J. Ryan
B.J. Ryan
10.48
560
21
28
.429
0
3.37
625
0
0
117
536.2
424
201
216
42
264
17
249
27
2,273
21
4.43
2.37
0.70
27.5
11.6
1.28
.288
3.62
7.11
24Joe Nathan
J. Nathan
10.42
758
52
29
.642
0
2.50
881
0
0
377
761.0
540
211
222
60
248
18
587
27
3,048
41
2.93
3.55
0.71
28.9
8.1
1.04
.261
2.63
6.39
25Taylor Rogers
T. Rogers
10.38
571
31
36
.463
0
3.35
629
0
0
83
545.1
486
203
235
57
167
36
167
22
2,273
12
2.76
3.77
0.94
27.7
7.3
1.20
.310
3.88
8.02
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Brewers Brewers
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