all-time single season era- leaders, minimum 50 ip, maximum 9 saves, maximum 5 starts

Rob Murphy has the best ERA- with 9 or fewer saves, with 50.0+ innings pitched and 5 or fewer starts in a season, with an ERA- of 19 in his rookie season in 1986.

	NAME	ERA-	IP	SV	GS	SEASON	TM	G	W	L	W%	ERA	SO	CG	SHO	H	ER	R	HR	BB	HBP	GF	IBB	TBF	WP	K/9	BB/9	K/BB	HR/9	K%	BB%	WHIP	BABIP	RA	FIP	FIP-	H/9	PRAA
1	Rob Murphy R. Murphy	19	50.1	1	0	1986	CIN	34	6	0	1.000	0.72	36	0	0	26	4	4	0	21	0	12	2	195	5	6.44	3.75	1.71	0.00	18.5	10.8	0.93	.188	0.72	2.58	67	4.65	7
2	Dennys Reyes D. Reyes	20	50.2	0	0	2006	MIN	66	5	0	1.000	0.89	49	0	0	35	5	8	3	15	0	8	2	194	4	8.70	2.66	3.27	0.53	25.3	7.7	0.99	.252	1.42	2.86	65	6.22	8.7
3	Chris Martin C. Martin	23	51.1	3	0	2023	BOS	55	4	1	.800	1.05	46	0	0	45	6	6	2	8	0	12	3	199	1	8.06	1.40	5.75	0.35	23.1	4.0	1.03	.301	1.05	2.43	56	7.89	10.7
4	Chris Hammond C. Hammond	23	76.0	0	0	2002	ATL	63	7	2	.778	0.95	63	0	0	53	8	15	1	31	1	6	9	311	1	7.46	3.67	2.03	0.12	20.3	10.0	1.11	.242	1.78	2.73	65	6.28	12.3
5	Bill Henry B. Henry	24	52.0	6	0	1964	CIN	37	2	2	.500	0.87	28	0	0	31	5	9	2	12	3	20	4	202	1	4.85	2.08	2.33	0.35	13.9	5.9	0.83	.185	1.56	2.89	82	5.37	3.6
6	Aaron Loup A. Loup	24	56.2	0	2	2021	NYM	65	6	0	1.000	0.95	57	0	0	37	6	9	1	16	4	6	0	218	0	9.05	2.54	3.56	0.16	26.1	7.3	0.94	.257	1.43	2.44	58	5.88	11.2
7	Wade Davis W. Davis	25	72.0	3	0	2014	KCR	71	9	2	.818	1.00	109	0	0	38	8	8	0	23	3	11	0	279	1	13.63	2.88	4.74	0.00	39.1	8.2	0.85	.264	1.00	1.18	32	4.75	20.7
8	David Robertson D. Robertson	26	66.2	1	0	2011	NYY	70	4	0	1.000	1.08	100	0	0	40	8	9	1	35	1	8	6	272	6	13.50	4.72	2.86	0.14	36.8	12.9	1.13	.289	1.21	1.83	44	5.40	17
9	Cla Meredith C. Meredith	26	50.2	0	0	2006	SDP	45	5	1	.833	1.07	37	0	0	30	6	6	3	6	2	11	3	185	0	6.57	1.07	6.17	0.53	20.0	3.2	0.71	.197	1.07	2.92	67	5.33	8.2
10	Eric O'Flaherty E. O'Flaherty	26	73.2	0	0	2011	ATL	78	2	4	.333	0.98	67	0	0	59	8	9	2	21	3	5	8	301	1	8.19	2.57	3.19	0.24	22.3	7.0	1.09	.274	1.10	2.53	67	7.21	10.3
11	Neal Cotts N. Cotts	26	57.0	1	0	2013	TEX	58	8	3	.727	1.11	65	0	0	36	7	8	2	18	0	6	1	223	3	10.26	2.84	3.61	0.32	29.1	8.1	0.95	.246	1.26	2.17	53	5.68	11.8
12	Brusdar Graterol B. Graterol	28	67.1	7	1	2023	LAD	68	4	2	.667	1.20	48	0	0	53	9	14	3	12	2	19	1	257	2	6.42	1.60	4.00	0.40	18.7	4.7	0.97	.260	1.87	3.03	68	7.08	10.6
13	Evan Phillips E. Phillips	29	63.0	2	0	2022	LAD	64	7	3	.700	1.14	77	0	0	33	8	11	2	15	3	9	1	233	0	11.00	2.14	5.13	0.29	33.0	6.4	0.76	.228	1.57	1.93	48	4.71	14.5
14	Ryne Stanek R. Stanek	30	54.2	1	0	2022	HOU	59	2	1	.667	1.15	62	0	0	36	7	8	2	31	0	10	1	224	4	10.21	5.10	2.00	0.33	27.7	13.8	1.23	.264	1.32	3.01	77	5.93	5.4
15	Carlos Marmol C. Marmol	31	69.1	1	0	2007	CHC	59	5	1	.833	1.43	96	0	0	41	11	11	3	35	4	6	3	285	5	12.46	4.54	2.74	0.39	33.7	12.3	1.10	.259	1.43	2.71	60	5.32	13.9
16	Andrew Miller A. Miller	32	62.2	2	0	2017	CLE	57	4	3	.571	1.44	95	0	0	31	10	11	3	21	5	6	0	244	1	13.64	3.02	4.52	0.43	38.9	8.6	0.83	.233	1.58	1.99	45	4.45	16.7
17	Joey Eischen J. Eischen	32	53.2	2	0	2002	MON	59	6	1	.857	1.34	51	0	0	43	8	11	1	18	2	18	5	217	6	8.55	3.02	2.83	0.17	23.5	8.3	1.14	.290	1.84	2.41	56	7.21	10.9
18	Calvin Schiraldi C. Schiraldi	33	51.0	9	0	1986	BOS	25	4	2	.667	1.41	55	0	0	36	8	8	5	15	1	21	2	198	1	9.71	2.65	3.67	0.88	27.8	7.6	1.00	.254	1.41	2.82	69	6.35	7.2
19	Will Harris W. Harris	33	60.0	4	0	2019	HOU	68	4	1	.800	1.50	62	0	0	42	10	14	6	14	0	10	0	229	3	9.30	2.10	4.43	0.90	27.1	6.1	0.93	.245	2.10	3.14	69	6.30	9.3
20	Rafael Betancourt R. Betancourt	33	79.1	3	0	2007	CLE	68	5	1	.833	1.47	80	0	0	51	13	13	4	9	0	15	3	289	0	9.08	1.02	8.89	0.45	27.7	3.1	0.76	.240	1.47	2.21	51	5.79	19.2
21	Frank Williams F. Williams	34	52.1	1	0	1986	SFG	36	3	1	.750	1.20	33	0	0	35	7	8	0	21	4	12	4	194	1	5.68	3.61	1.57	0.00	17.0	10.8	1.07	.257	1.38	2.93	79	6.02	4.5
22	Pat Neshek P. Neshek	34	62.1	1	0	2017	TOT	71	5	3	.625	1.59	69	0	0	48	11	13	3	6	0	7	0	235	0	9.96	0.87	11.50	0.43	29.4	2.6	0.87	.287	1.88	1.85	42	6.93	17.6
23	Joaquin Benoit J. Benoit	34	60.1	1	0	2010	TBR	63	1	2	.333	1.34	75	0	0	30	9	10	6	11	0	16	1	217	1	11.19	1.64	6.82	0.90	34.6	5.1	0.68	.192	1.49	2.43	60	4.48	11.1
24	Scott Downs S. Downs	34	53.2	1	0	2011	LAA	60	6	3	.667	1.34	35	0	0	39	8	11	3	15	0	10	3	218	2	5.87	2.52	2.33	0.50	16.1	6.9	1.01	.218	1.84	3.28	83	6.54	4.1
25	Dan Otero D. Otero	35	70.2	1	0	2016	CLE	62	5	1	.833	1.53	57	0	0	54	12	14	2	10	0	20	1	269	2	7.26	1.27	5.70	0.25	21.2	3.7	0.91	.260	1.78	2.32	54	6.88	15.3