best era by a relief pitcher with a minimum of 40 games

Deacon Phillippe had the lowest ERA by a relief pitcher when pitching in 40+ games, with an ERA of 0.00.

	NAME	ERA	G	W	L	W%	GS	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	H/9
1	Deacon Phillippe D. Phillippe	0.00	41	9	1	.900	0	36	0	0	4	119.0	108		55	2	15	2	29		470	2	2.72	1.13	2.40	0.15	7.7	3.2	1.03	.255	4.16	8.17
2	Al Mattern A. Mattern	0.32	45	6	7	.462	0	44	0	0	4	142.0	155		95	3	49	3	38		578	4	2.79	3.11	0.90	0.19	7.6	8.5	1.44	.317	6.02	9.82
3	Harry Gaspar H. Gaspar	0.42	45	6	6	.500	0	24	0	0	11	108.0	102		46	0	27	9	38		438	3	2.00	2.25	0.89	0.00	5.5	6.2	1.19	.270	3.83	8.50
4	Ralph Works R. Works	0.43	51	6	2	.750	0	79	0	0	4	145.0	149		93	1	66	8	42		631	9	4.90	4.10	1.20	0.06	12.5	10.5	1.48	.310	5.77	9.25
5	Ed Walsh E. Walsh	0.70	77	18	11	.621	0	145	0	0	28	179.2	138		68	2	32	3	72		694	9	7.26	1.60	4.53	0.10	20.9	4.6	0.95	.266	3.41	6.91
6	Joe Wood J. Wood	0.73	67	20	8	.714	0	139	0	0	10	159.1	134		64	0	52	5	58		641	9	7.85	2.94	2.67	0.00	21.7	8.1	1.17	.301	3.62	7.57
7	Jack Rowan J. Rowan	0.75	45	8	5	.615	0	58	0	0	3	132.1	116		69	1	67	4	35		552	4	3.94	4.56	0.87	0.07	10.5	12.1	1.38	.273	4.69	7.89
8	Joe Lake J. Lake	0.79	60	15	9	.625	0	98	0	0	5	239.1	254		152	7	55	2	54		1,005	8	3.69	2.07	1.78	0.26	9.8	5.5	1.29	.293	5.72	9.55
9	Howie Camnitz H. Camnitz	0.85	68	22	8	.733	0	135	0	0	13	233.2	189		87	3	85	9	55			9	5.20	3.27	1.59	0.12		9.3	1.17	.272	3.35	7.28
10	George Mullin G. Mullin	0.86	41	18	2	.900	0	51	0	0	3	146.2	124		60	2	48	5	34			1	3.13	2.95	1.06	0.12		14.4	1.17	.535	3.68	7.61
11	Eddie Cicotte E. Cicotte	0.89	139	25	12	.676	0	155	0	0	24	354.0	282		120	3	104	9	103		1,383	6	3.94	2.64	1.49	0.08	11.2	7.5	1.09	.251	3.05	7.17
12	Tom Hughes T. Hughes	0.94	57	10	7	.588	0	89	0	0	11	162.1	131		61	1	49	6	46		663	6	4.93	2.72	1.82	0.06	13.4	7.4	1.11	.251	3.38	7.26
13	Buster Brown B. Brown	1.16	56	4	6	.400	0	71	0	0	2	186.2	203		114	5	73	5	44		772	5	3.42	3.52	0.97	0.24	9.2	9.5	1.48	.320	5.50	9.79
14	Charley Hall C. Hall	1.18	100	24	4	.857	0	152	0	0	11	319.2	259		143	6	134	10	81		1,312	5	4.28	3.77	1.13	0.17	11.6	10.2	1.23	.250	4.03	7.29
15	Jack Warhop J. Warhop	1.23	71	13	14	.481	0	103	0	0	7	263.2	220		103	4	68	17	62		1,054	2	3.52	2.32	1.51	0.14	9.8	6.5	1.09	.251	3.52	7.51
16	Mordecai Brown M. Brown	1.25	127	31	16	.660	0	179	0	0	33	332.1	283		127	5	72	7	117			15	4.85	1.95	2.49	0.14		6.9	1.07	.353	3.44	7.66
17	Nap Rucker N. Rucker	1.40	55	14	14	.500	0	94	0	0	13	167.2	152		69	6	59	7	51		687	0	5.05	3.17	1.59	0.32	13.7	8.6	1.26	.280	3.70	8.16
18	Ed Willett E. Willett	1.42	67	7	14	.333	0	60	0	0	5	184.1	198		126	6	66	10	51			7	2.93	3.22	0.91	0.29		12.1	1.43	.476	6.15	9.67
19	Tom Hughes T. Hughes	1.44	72	17	3	.850	0	131	0	0	17	194.1	128		58	3	57	6	56		736	4	6.07	2.64	2.30	0.14	17.8	7.7	0.95	.232	2.69	5.93
20	George McQuillan G. McQuillan	1.46	99	8	12	.400	0	105	0	0	17	259.1	225		114	4	69	10	75		1,050	4	3.64	2.39	1.52	0.14	10.0	6.6	1.13	.256	3.96	7.81
21	Elwood Richie E. Richie	1.48	80	12	9	.571	0	86	0	0	9	249.0	217		131	5	111	9	59		1,007	5	3.11	4.01	0.77	0.18	8.5	11.0	1.32	.266	4.73	7.84
22	Eddie Plank E. Plank	1.52	81	23	11	.676	0	132	0	0	23	219.0	182		81	1	64	4	67			11	5.42	2.63	2.06	0.04		8.8	1.12	.343	3.33	7.48
23	Willie Mitchell W. Mitchell	1.55	86	10	9	.526	0	155	0	0	4	243.2	200		116	2	87	25	66		988	13	5.73	3.21	1.78	0.07	15.7	8.8	1.18	.275	4.28	7.39
24	Andy Messersmith A. Messersmith	1.58	49	5	0	1.000	0	97	0	0	14	97.0	45	17	17	6	36	1	30	7	368	1	9.00	3.34	2.69	0.56	26.4	9.8	0.84	.171	1.58	4.18
25	Wilbur Cooper W. Cooper	1.60	111	21	9	.700	0	145	0	0	14	304.1	262	54	87	4	88	11	81		1,241	9	4.29	2.60	1.65	0.12	11.7	7.1	1.15	.260	2.57	7.75