lowest all-time era- with a minimum of 500 games

Mariano Rivera had the lowest ERA- when pitching in 500+ games, with an ERA- of 49.

Interpreted as:

lowest all-time era- by a player with a minimum of 500 games

	NAME	ERA-	G	W	L	W%	GS	ERA	SO	CG	SHO	SV	IP	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	Mariano Rivera M. Rivera	49	1,115	82	60	.577	10	2.21	1,173	0	0	652	1283.2	998	315	340	71	286	46	952	41	5,103	13	8.22	2.01	4.10	0.50	23.0	5.6	1.00	.263	2.38	2.76	61	7.00	246.7
2	Billy Wagner B. Wagner	54	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	11.92	2.99	3.99	0.82	33.2	8.3	1.00	.261	2.61	2.72	63	5.99	159
3	Jonathan Papelbon J. Papelbon	58	689	41	36	.532	3	2.44	808	0	0	368	725.2	572	197	226	57	185	34	585	18	2,938	14	10.02	2.29	4.37	0.71	27.5	6.3	1.04	.278	2.80	2.80	69	7.09	105.2
4	Darren O'Day D. O'Day	61	644	42	21	.667	0	2.59	637	0	0	21	609.0	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
5	Aroldis Chapman A. Chapman	62	846	58	46	.558	0	2.55	1,311	0	0	356	805.2	468	228	253	54	406	33	548	7	3,284	84	14.65	4.54	3.23	0.60	39.9	12.4	1.08	.280	2.83	2.38	57	5.23	156.2
6	Craig Kimbrel C. Kimbrel	63	838	56	47	.544	0	2.59	1,266	0	0	440	810.2	483	233	259	73	340	40	651	11	3,260	70	14.06	3.77	3.72	0.81	38.8	10.4	1.02	.266	2.88	2.58	63	5.36	131.9
7	Tom Henke T. Henke	64	642	41	42	.494	0	2.67	861	0	0	311	789.2	607	234	252	64	255	9	548	29	3,194	30	9.81	2.91	3.38	0.73	27.0	8.0	1.09	.271	2.87	2.71	66	6.92	123.5
8	Kenley Jansen K. Jansen	65	918	53	38	.582	0	2.58	1,263	0	0	467	911.1	605	261	280	86	276	31	687	20	3,621	21	12.47	2.73	4.58	0.85	34.9	7.6	0.97	.264	2.77	2.59	64	5.97	147.1
9	Joe Nathan J. Nathan	67	787	64	34	.653	29	2.87	976	0	0	377	923.1	690	294	317	84	344	23	587	31	3,771	47	9.51	3.35	2.84	0.82	25.9	9.1	1.12	.259	3.09	3.35	78	6.73	93.6
10	Walter Johnson W. Johnson	68	802	417	279	.599	666	2.17	3,509	531	110	34	5914.1	4,913	1,424	1,902	97	1,363	205	127		23,405	154	5.34	2.07	2.57	0.15	15.0	5.8	1.06	.264	2.89	2.42	76	7.48	472.8
11	Blake Treinen B. Treinen	68	512	43	36	.544	7	2.82	577	0	0	82	561.1	473	176	201	42	211	19	193	22	2,316	23	9.25	3.38	2.73	0.67	24.9	9.1	1.22	.294	3.22	3.30	79	7.58	53.3
12	Brad Ziegler B. Ziegler	68	739	37	38	.493	0	2.75	479	0	0	105	717.1	654	219	251	32	248	25	264	55	2,947	7	6.01	3.11	1.93	0.40	16.3	8.4	1.26	.288	3.15	3.49	87	8.21	41.9
13	Lefty Grove L. Grove	68	616	300	141	.680	457	3.06	2,266	298	35	54	3940.2	3,849	1,339	1,594	162	1,187	42	123		16,622	51	5.18	2.71	1.91	0.37	13.6	7.1	1.28	.284	3.64	3.36	76	8.79	462.8
14	Hoyt Wilhelm H. Wilhelm	68	1,070	143	122	.540	52	2.52	1,610	20	5	228	2254.1	1,757	632	773	150	778	62	651	61	9,164	90	6.43	3.11	2.07	0.60	17.6	8.5	1.12	.245	3.09	3.06	82	7.01	167.6
15	Francisco Rodriguez F. Rodriguez	69	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	10.53	3.59	2.94	0.90	28.5	9.7	1.15	.271	3.10	3.30	79	6.81	97
16	Dan Quisenberry D. Quisenberry	69	674	56	46	.549	0	2.76	379	0	0	244	1043.1	1,064	320	356	59	162	7	553	70	4,247	4	3.27	1.40	2.34	0.51	8.9	3.8	1.18	.276	3.07	3.23	82	9.18	81.6
17	Troy Percival T. Percival	69	703	35	43	.449	1	3.17	781	0	0	358	708.2	479	250	271	85	306	27	546	25	2,915	32	9.92	3.89	2.55	1.08	26.8	10.5	1.11	.230	3.44	3.86	85	6.08	56.9
18	Pat Neshek P. Neshek	70	544	36	25	.590	0	2.82	471	0	0	16	488.0	375	153	167	57	133	9	119	21	1,959	9	8.69	2.45	3.54	1.05	24.0	6.8	1.04	.247	3.08	3.60	88	6.92	27.6
19	David Robertson D. Robertson	70	861	66	46	.589	1	2.91	1,154	0	0	177	876.2	656	283	306	77	357	25	354	37	3,612	57	11.85	3.67	3.23	0.79	31.9	9.9	1.16	.290	3.14	2.94	69	6.73	123.6
20	Roger Clemens R. Clemens	70	709	354	184	.658	707	3.12	4,672	118	46	0	4916.2	4,185	1,707	1,885	363	1,580	159	0	63	20,240	143	8.55	2.89	2.96	0.66	23.1	7.8	1.17	.284	3.45	3.08	71	7.66	680.4
21	John Wetteland J. Wetteland	70	618	48	45	.516	17	2.93	804	0	0	330	765.0	616	249	287	73	252	16	523	30	3,145	40	9.46	2.96	3.19	0.86	25.6	8.0	1.13	.272	3.38	3.19	75	7.25	90.2
22	Raisel Iglesias R. Iglesias	70	580	42	55	.433	21	2.99	849	0	0	240	716.1	562	238	264	83	196	27	440	17	2,890	17	10.67	2.46	4.33	1.04	29.4	6.8	1.06	.276	3.32	3.23	77	7.06	78.1
23	Jesse Crain J. Crain	71	532	45	30	.600	0	3.05	440	0	0	4	532.0	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
24	Rafael Soriano R. Soriano	71	591	24	28	.462	8	2.89	641	0	0	207	636.1	489	204	213	62	197	15	343	20	2,571	13	9.07	2.79	3.25	0.88	24.9	7.7	1.08	.258	3.01	3.34	81	6.92	58.6
25	Huston Street H. Street	71	668	42	34	.553	0	2.95	665	0	0	324	680.0	542	223	237	70	183	8	525	37	2,718	20	8.80	2.42	3.63	0.93	24.5	6.7	1.07	.263	3.14	3.32	81	7.17	61.7