most strikeouts per 9 innings in mlb relievers career at least 500 ip

Edwin Díaz has the highest career K/9 by a relief pitcher when pitching at least 500 innings, with 14.50 per nine innings.

Showing:

Regular season

	NAME	K/9	IP	G	W	L	W%	GS	ERA	SO	CG	SHO	SV	H	ER	R	HR	BB	HBP	GF	IBB	TBF	WP	BB/9	K/BB	HR/9	K%	BB%	WHIP	BABIP	RA	H/9
1	Edwin Díaz E. Díaz	14.50	538.0	541	30	38	.441	0	3.03	867	0	0	260	382	181	194	57	193	43	409	11	2,201	34	3.23	4.49	0.95	39.4	8.8	1.07	.312	3.25	6.39
2	Aroldis Chapman A. Chapman	14.45	873.0	916	63	51	.553	0	2.48	1,402	0	0	402	510	241	268	57	431	34	607	7	3,554	90	4.44	3.25	0.59	39.4	12.1	1.08	.278	2.76	5.26
3	Josh Hader J. Hader	14.28	557.0	513	38	33	.535	0	2.50	884	0	0	252	301	155	170	66	213	24	358	6	2,186	20	3.44	4.15	1.07	40.4	9.7	0.92	.235	2.75	4.86
4	Craig Kimbrel C. Kimbrel	13.71	867.2	897	57	53	.518	0	2.69	1,322	0	0	441	532	259	290	79	368	43	674	13	3,502	74	3.82	3.59	0.82	37.7	10.5	1.04	.268	3.01	5.52
5	Andrew Miller A. Miller	12.93	504.0	546	35	28	.556	0	2.95	724	0	0	63	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
6	Carlos Marmol C. Marmol	12.33	509.1	506	18	29	.383	0	3.25	698	0	0	117	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
7	Kenley Jansen K. Jansen	12.30	972.1	984	58	46	.558	0	2.60	1,329	0	0	497	634	281	302	95	305	33	739	21	3,860	22	2.82	4.36	0.88	34.4	7.9	0.97	.257	2.80	5.87
8	Billy Wagner B. Wagner	11.92	903.0	853	47	40	.540	0	2.31	1,196	0	0	422	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
9	Brad Lidge B. Lidge	11.92	600.1	602	26	32	.448	0	3.55	795	0	0	225	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
10	David Robertson D. Robertson	11.84	893.1	880	68	46	.596	0	2.93	1,175	0	0	179	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
11	Jake Diekman J. Diekman	11.42	602.1	705	27	34	.443	0	3.91	764	0	0	19	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
12	Octavio Dotel O. Dotel	11.31	760.0	724	50	41	.549	0	3.32	955	0	0	109	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
13	Greg Holland G. Holland	11.13	547.2	556	30	28	.517	0	3.14	677	0	0	220	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
14	Héctor Neris H. Neris	11.12	627.1	643	46	43	.517	0	3.47	775	0	0	107	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
15	Ugueth Urbina U. Urbina	11.03	585.2	562	36	42	.462	0	3.24	718	0	0	237	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
16	Will Smith W. Smith	11.02	558.2	601	27	35	.435	0	3.58	684	0	0	113	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
17	Armando Benitez A. Benitez	10.93	779.0	762	40	47	.460	0	3.13	946	0	0	289	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
18	Raisel Iglesias R. Iglesias	10.69	675.1	638	39	49	.443	0	2.72	802	0	0	287	510	204	233	74	185	21	508	18	2,700	16	2.47	4.34	0.99	29.7	6.9	1.03	.269	3.11	6.80
19	Brad Hand B. Hand	10.59	550.0	536	32	31	.508	0	3.31	647	0	0	132	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
20	Francisco Rodriguez F. Rodriguez	10.53	976.0	948	52	53	.495	0	2.86	1,142	0	0	437	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
21	Adam Ottavino A. Ottavino	10.51	730.1	724	41	41	.500	0	3.40	853	0	0	46	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
22	B.J. Ryan	10.48	536.2	560	21	28	.429	0	3.37	625	0	0	117	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
23	Joe Nathan J. Nathan	10.42	761.0	758	52	29	.642	0	2.50	881	0	0	377	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
24	Emilio Pagán E. Pagán	10.30	546.1	520	33	28	.541	0	3.66	625	0	0	90	426	222	239	92	158	15	214	7	2,215	17	2.60	3.96	1.52	28.2	7.1	1.07	.252	3.94	7.02
25	Taylor Rogers T. Rogers	10.17	601.2	631	37	40	.481	0	3.44	680	0	0	85	547	230	268	62	196	41	182	28	2,532	12	2.93	3.47	0.93	26.9	7.7	1.23	.312	4.01	8.18

Unlock 2x data

StatMuse has game-level data for K/9 and innings pitched going back to the 1901 season.

Some of the information used here was obtained free of charge from Retrosheet.

More MLB News

Rangers disappointed after stumbling on final weekend of season and missing playoffs

Sep 28, 2026

Astros rebound from 11 games under .500, win AL West despite finishing 81-81

Sep 28, 2026

Diamondbacks manager Torey Lovullo wants 'to be wanted' with future up in air after playoff miss

Sep 28, 2026

Max Unlimited: Scherzer strikes out 7 on short rest for Blue Jays to beat Reds in season finale

Sep 28, 2026

Brewers' Jacob Misiorowski ready for the playoffs after completing his history-making regular season

Sep 27, 2026

The Seattle Mariners have fired manager Dan Wilson

Sep 27, 2026

More Mets Stats

Team Batting Leaders

27

Soto

RBI

78

Bichette

AVG

.282

Benge

Team Pitching Leaders

12

McLean

194

McLean

ERA

3.16

McLean

Team Rankings

204

7th

699

20th

1,450

6th

ERA

4.15

16th

2026 Division Standings

TEAM	W	L	PCT	GB
Braves	94	68	.580
Phillies	88	74	.543	6.0
Marlins	80	82	.494	14.0
Nationals	77	85	.475	17.0
Mets	74	88	.457	20.0

Last Game

Mets

74 - 88

Final

Nationals

77 - 85

Sun 27 Sep 2026

MLB 2026 Batting Leaders

HR Leaders

45

Crow-Armstrong

45

Schwarber

43

Alonso

RBI Leaders

116

Burleson

113

Alonso

111

Stewart

Batting Average Leaders

.316

Alvarez

.311

Moreno

.310

Arraez

Hit Leaders

191

Lopez

185

Arraez

181

Tatis

Run Leaders

119

Crow-Armstrong

113

Arozarena

106

Vargas

OBP Leaders

.432

Alvarez

.390

Rumfield

.389

Bauers

SLG Leaders

.601

Alvarez

.570

Crow-Armstrong

.534

Rice

SB Leaders

49

Nuñez

46

Simpson

45

Witt

MLB 2026 Pitching Leaders

Win Leaders

18

Sánchez

18

Gray

16

Misiorowski

Strikeout Leaders

252

Misiorowski

248

Williams

239

Schlittler

ERA Leaders

1.80

Misiorowski

1.95

Schlittler

2.16

Sale

WHIP Leaders

0.80

Misiorowski

0.87

Yamamoto

0.91

Rasmussen

K/9 Leaders

12.98

Misiorowski

12.73

Cease

12.11

Williams

K/BB Leaders

6.45

Sale

5.73

Misiorowski

5.44

Rasmussen

Walk Leaders

26

Martinez

31

Sale

32

Rasmussen

MLB Fantasy 2026

FanDuel Points Leaders

2,357.3

Crow-Armstrong

2,289.3

Ohtani

2,096

Alvarez

DraftKings Points Leaders

1,789

Crow-Armstrong

1,613.6

Ohtani

1,571

Alvarez

MLB 2026 Betting

Best Record ATS

93-69

92-70

91-71

88-74

87-75

85-76

Worst Record ATS

60-102

69-93

75-87

76-86

MLB 2026 Standings

NL East	W	L	PCT	GB
Braves - y	94	68	.580
Phillies - w	88	74	.543	6.0
Marlins	80	82	.494	14.0
Nationals	77	85	.475	17.0
Mets	74	88	.457	20.0
NL Central	W	L	PCT	GB
Brewers - y	103	59	.636
Cubs - w	89	73	.549	14.0
Pirates	82	80	.506	21.0
Cardinals	77	85	.475	26.0
Reds	75	87	.463	28.0
NL West	W	L	PCT	GB
Dodgers - y	100	62	.617
Padres - w	91	71	.562	9.0
Diamondbacks	86	76	.531	14.0
Giants	65	97	.401	35.0
Rockies	58	104	.358	42.0

AL East	W	L	PCT	GB
Rays - y	98	64	.605
Yankees - w	93	68	.578	4.5
Red Sox - w	87	75	.537	11.0
Orioles	79	82	.491	18.5
Blue Jays	79	83	.488	19.0
AL Central	W	L	PCT	GB
Guardians - y	85	77	.525
White Sox - w	84	78	.519	1.0
Twins	77	85	.475	8.0
Tigers	76	86	.469	9.0
Royals	69	93	.426	16.0
AL West	W	L	PCT	GB
Astros - y	81	81	.500
Rangers	80	82	.494	1.0
Mariners	76	86	.469	5.0
Athletics	64	98	.395	17.0
Angels	62	100	.383	19.0