all-time era- leaders, minimum 500 ip, maximum 100 saves, maximum 25 starts

Darren O'Day has the best career ERA- with at most 100 saves, when pitching at least 500 innings and starting 25 or fewer games, with an ERA- of 61.

	NAME	ERA-	IP	SV	GS	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	Darren O'Day D. O'Day	61	609.0	21	0	644	42	21	.667	2.59	637	0	0	458	175	189	64	172	50	155	24	2,461	3	9.41	2.54	3.70	0.95	25.9	7.0	1.03	.256	2.79	3.48	82	6.77	52.4
2	Blake Treinen B. Treinen	70	576.1	82	7	531	45	41	.523	2.90	596	0	0	487	186	213	43	223	20	197	26	2,386	24	9.31	3.48	2.67	0.67	25.0	9.3	1.23	.295	3.33	3.32	80	7.60	53.5
3	Jesse Crain J. Crain	71	532.0	4	0	532	45	30	.600	3.05	440	0	0	449	180	205	44	206	18	116	27	2,221	14	7.44	3.48	2.14	0.74	19.8	9.3	1.23	.268	3.47	3.76	89	7.60	27.6
4	Mark Eichhorn M. Eichhorn	72	885.2	32	7	563	48	43	.527	3.00	640	0	0	825	295	328	49	270	40	226	63	3,702	25	6.50	2.74	2.37	0.50	17.3	7.3	1.24	.287	3.33	3.17	76	8.38	100.3
5	Scot Shields S. Shields	73	697.0	21	15	491	46	44	.511	3.18	631	0	0	589	246	285	55	278	21	114	21	2,916	49	8.15	3.59	2.27	0.71	21.6	9.5	1.24	.277	3.68	3.57	82	7.61	61.2
6	Chad Bradford C. Bradford	73	515.2	11	0	561	36	28	.563	3.26	313	0	0	527	187	214	28	137	29	115	39	2,180	4	5.46	2.39	2.28	0.49	14.4	6.3	1.29	.298	3.73	3.54	79	9.20	53.7
7	Tony Watson T. Watson	73	648.1	32	0	689	47	29	.618	2.90	570	0	0	528	209	222	63	174	33	109	20	2,620	5	7.91	2.42	3.28	0.87	21.8	6.6	1.08	.261	3.08	3.59	91	7.33	24.5
8	Jared Hughes J. Hughes	74	541.1	12	0	542	30	26	.536	2.96	371	0	0	480	178	210	47	190	40	129	25	2,247	29	6.17	3.16	1.95	0.78	16.5	8.5	1.24	.271	3.49	4.17	103	7.98	-8.5
9	Kelvin Herrera K. Herrera	76	513.2	61	0	522	27	32	.458	3.21	510	0	0	458	183	197	50	160	16	166	17	2,140	26	8.94	2.80	3.19	0.88	23.8	7.5	1.20	.291	3.45	3.43	83	8.02	39
10	Rafael Betancourt R. Betancourt	76	685.2	75	0	680	38	37	.507	3.36	724	0	0	596	256	274	71	164	1	241	40	2,787	17	9.50	2.15	4.41	0.93	26.0	5.9	1.11	.287	3.60	3.04	71	7.82	92
11	Jeff Nelson J. Nelson	76	784.2	33	0	798	48	45	.516	3.41	829	0	0	633	297	329	55	428	64	237	59	3,402	36	9.51	4.91	1.94	0.63	24.4	12.6	1.35	.285	3.77	3.72	84	7.26	67.2
12	Steve Howe S. Howe	76	606.0	91	0	497	47	41	.534	3.03	328	0	0	586	204	239	32	139	18	257	54	2,523	17	4.87	2.06	2.36	0.48	13.0	5.5	1.20	.276	3.55	3.20	81	8.70	49.4
13	Steve Reed S. Reed	77	870.2	18	0	833	49	44	.527	3.63	630	0	0	811	351	384	107	285	61	197	46	3,662	11	6.51	2.95	2.21	1.11	17.2	7.8	1.26	.273	3.97	4.41	97	8.38	12.6
14	Tyler Clippard T. Clippard	77	872.1	74	14	807	56	48	.538	3.16	956	0	0	625	306	327	112	344	32	212	19	3,575	48	9.86	3.55	2.78	1.16	26.7	9.6	1.11	.241	3.37	3.88	95	6.45	18.9
15	Joe Smith J. Smith	77	762.1	30	0	866	55	34	.618	3.14	666	0	0	653	266	289	66	254	40	176	31	3,150	19	7.86	3.00	2.62	0.78	21.1	8.1	1.19	.276	3.41	3.65	89	7.71	39
16	Greg McMichael G. McMichael	77	523.1	53	0	453	31	29	.517	3.25	459	0	0	483	189	215	42	193	9	164	48	2,213	32	7.89	3.32	2.38	0.72	20.7	8.7	1.29	.292	3.70	3.54	82	8.31	41.9
17	Dave Veres D. Veres	77	694.0	95	0	605	36	35	.507	3.44	617	0	0	661	265	287	78	257	28	284	30	2,957	45	8.00	3.33	2.40	1.01	20.9	8.7	1.32	.295	3.72	4.01	91	8.57	30.5
18	Damaso Marte D. Marte	78	503.2	36	0	570	23	27	.460	3.48	533	0	0	405	195	209	48	229	26	137	30	2,118	15	9.52	4.09	2.33	0.86	25.2	10.8	1.26	.278	3.73	3.71	82	7.24	44.9
19	Pedro Strop P. Strop	78	505.2	32	0	561	29	30	.492	3.20	554	0	0	360	180	194	34	232	37	141	19	2,111	54	9.86	4.13	2.39	0.61	26.2	11.0	1.17	.260	3.45	3.40	83	6.41	38.8
20	Matt Thornton M. Thornton	79	662.2	23	1	748	36	46	.439	3.41	642	0	0	594	251	273	52	251	20	170	37	2,799	28	8.72	3.41	2.56	0.71	22.9	9.0	1.28	.296	3.71	3.40	79	8.07	66.8
21	Taylor Rogers T. Rogers	79	541.1	83	0	566	31	36	.463	3.34	626	0	0	482	201	233	57	165	36	164	22	2,256	12	10.41	2.74	3.79	0.95	27.7	7.3	1.20	.310	3.87	3.33	79	8.01	54.9
22	Luis Ayala L. Ayala	79	554.1	19	0	534	38	47	.447	3.34	367	0	0	581	206	233	54	139	35	161	24	2,340	11	5.96	2.26	2.64	0.88	15.7	5.9	1.30	.302	3.78	3.95	93	9.43	19.9
23	Adam Ottavino A. Ottavino	79	744.2	46	3	727	41	43	.488	3.48	862	0	0	628	288	308	72	330	50	168	32	3,167	66	10.42	3.99	2.61	0.87	27.2	10.4	1.29	.300	3.72	3.61	85	7.59	49.8
24	Andrew Chafin A. Chafin	80	542.0	20	3	643	22	28	.440	3.35	591	0	0	462	202	223	39	234	16	105	18	2,288	36	9.81	3.89	2.53	0.65	25.8	10.2	1.28	.300	3.70	3.30	80	7.67	50.2
25	Jason Frasor J. Frasor	80	646.2	36	0	679	35	35	.500	3.49	615	0	0	568	251	267	56	283	23	205	32	2,747	38	8.56	3.94	2.17	0.78	22.4	10.3	1.32	.289	3.72	3.73	87	7.91	40.9