since 1960, who has the lowest era for a reliever minimum 150 ip

Since 1960, Emmanuel Clase has the best ERA by a relief pitcher when pitching at least 150 innings, with an ERA of 1.88.

	NAME	ERA	IP	G	W	L	W%	GS	SO	CG	SHO	SV	H	ER	R	HR	BB	HBP	GF	IBB	TBF	WP	K/9	BB/9	K/BB	HR/9	K%	BB%	WHIP	BABIP	RA	H/9
1	Emmanuel Clase E. Clase	1.88	359.0	365	21	25	.457	0	349	0	0	182	266	75	111	15	68	9	297	10	1,412	19	8.75	1.70	5.13	0.38	24.7	4.8	0.93	.258	2.78	6.67
2	Félix Bautista F. Bautista	2.01	161.1	156	13	7	.650	0	248	0	0	67	84	36	42	14	72	3	104	1	632	10	13.83	4.02	3.44	0.78	39.2	11.4	0.97	.237	2.34	4.69
3	Zack Britton Z. Britton	2.03	391.0	396	17	9	.654	0	367	0	0	154	276	88	102	17	153	8	250	6	1,551	36	8.45	3.52	2.40	0.39	23.7	9.9	1.10	.257	2.35	6.35
4	Mariano Rivera M. Rivera	2.06	1233.2	1,105	79	57	.581	0	1,135	0	0	652	934	282	305	63	266	44	952	41	4,870	13	8.28	1.94	4.27	0.46	23.3	5.5	0.97	.259	2.23	6.81
5	Hoyt Wilhelm H. Wilhelm	2.18	1134.0	623	78	67	.538	0	896	0	0	170	802	275	338	68	347	28	447	39	4,512	54	7.11	2.75	2.58	0.54	19.9	7.7	1.01	.231	2.68	6.37
6	Drew Pomeranz D. Pomeranz	2.25	191.2	186	9	7	.563	0	234	0	0	10	136	48	57	15	72	9	40	4	771	2	10.99	3.38	3.25	0.70	30.4	9.3	1.09	.274	2.68	6.39
7	Billy Wagner B. Wagner	2.31	903.0	853	47	40	.540	0	1,196	0	0	422	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	5.99
8	Takashi Saito T. Saito	2.34	338.0	338	21	15	.583	0	400	0	0	84	250	88	99	25	108	14	189	13	1,363	9	10.65	2.88	3.70	0.67	29.3	7.9	1.06	.276	2.64	6.66
9	Sammy Ellis S. Ellis	2.36	156.2	89	11	4	.733	0	138	0	0	18	117	41	44	12	56	4	51	6	637	5	7.93	3.22	2.46	0.69	21.7	8.8	1.10	.246	2.53	6.72
10	Jim Bibby J. Bibby	2.38	196.2	101	14	12	.538	0	127	0	0	8	167	52	68	7	99	2	39	14	837	11	5.81	4.53	1.28	0.32	15.2	11.8	1.35	.266	3.11	7.64
11	Andrés Muñoz A. Muñoz	2.39	245.0	248	12	21	.364	0	332	0	0	69	154	65	77	17	99	14	111	12	984	18	12.20	3.64	3.35	0.62	33.7	10.1	1.03	.262	2.83	5.66
12	Mike Adams M. Adams	2.41	407.1	408	21	20	.512	0	409	0	0	4	316	109	122	33	126	6	60	12	1,653	7	9.04	2.78	3.25	0.73	24.7	7.6	1.09	.262	2.70	6.98
13	John Smoltz J. Smoltz	2.41	261.1	242	4	6	.400	0	280	0	0	154	205	70	74	17	50	1	204	5	1,015	9	9.64	1.72	5.60	0.59	27.6	4.9	0.98	.282	2.55	7.06
14	Jhoan Duran J. Duran	2.42	238.1	229	17	23	.425	0	296	0	0	79	186	64	83	17	74	17	137	14	971	17	11.18	2.79	4.00	0.64	30.5	7.6	1.09	.298	3.13	7.02
15	Devin Williams D. Williams	2.42	283.0	293	30	15	.667	0	439	0	0	85	164	76	94	20	132	15	125	4	1,152	17	13.96	4.20	3.33	0.64	38.1	11.5	1.05	.264	2.99	5.22
16	Jim Umbricht J. Umbricht	2.43	159.1	81	9	1	.900	0	110	0	0	3	122	43	49	10	54	2	38	5	641	6	6.21	3.05	2.04	0.56	17.2	8.4	1.10	.241	2.77	6.89
17	Koji Uehara K. Uehara	2.43	414.0	424	20	22	.476	0	524	0	0	95	279	112	120	53	66	4	207	8	1,583	9	11.39	1.43	7.94	1.15	33.1	4.2	0.83	.241	2.61	6.07
18	Akinori Otsuka A. Otsuka	2.44	232.0	236	13	15	.464	0	217	0	0	39	190	63	71	12	80	2	96	15	951	4	8.42	3.10	2.71	0.47	22.8	8.4	1.16	.278	2.75	7.37
19	Jonathan Papelbon J. Papelbon	2.45	709.2	686	41	36	.532	0	793	0	0	368	557	193	221	55	175	32	585	17	2,867	13	10.06	2.22	4.53	0.70	27.7	6.1	1.03	.277	2.80	7.06
20	Bill Hands B. Hands	2.48	235.2	114	11	11	.500	0	143	0	0	14	210	65	79	11	70	6	69	15	966	11	5.46	2.67	2.04	0.42	14.8	7.2	1.19	.270	3.02	8.02
21	Bryan Harvey B. Harvey	2.49	387.0	322	17	25	.405	0	448	0	0	177	278	107	122	30	144	2	278	19	1,582	25	10.42	3.35	3.11	0.70	28.3	9.1	1.09	.259	2.84	6.47
22	Joe Nathan J. Nathan	2.50	761.0	758	52	29	.642	0	881	0	0	377	540	211	222	60	248	18	587	27	3,048	41	10.42	2.93	3.55	0.71	28.9	8.1	1.04	.261	2.63	6.39
23	Jeff Calhoun J. Calhoun	2.51	150.2	118	6	7	.462	0	104	0	0	5	120	42	57	8	65	1	45	15	629	10	6.21	3.88	1.60	0.48	16.5	10.3	1.23	.248	3.40	7.17
24	Tyler Holton T. Holton	2.53	224.1	173	15	5	.750	0	181	0	0	9	156	63	68	26	44	6	30	2	864	7	7.26	1.77	4.11	1.04	20.9	5.1	0.89	.214	2.73	6.26
25	Bill Swift B. Swift	2.53	309.1	183	11	7	.611	0	143	0	0	27	290	87	105	8	88	4	67	15	1,265	8	4.16	2.56	1.63	0.23	11.3	7.0	1.22	.276	3.05	8.44