most innings pitched by a pitcher with a 0.55 era all-time in a single season

Will White has pitched the most innings with an ERA of 0.55 or worse in a season, with 680 innings in 1879.

Interpreted as:

most innings pitched by a pitcher with a 0.55 or higher era all-time in a single season

	NAME	IP	ERA	SEASON	TM	G	W	L	W%	GS	SO	CG	SHO	SV	H	ER	R	HR	BB	HBP	GF	TBF	WP	K/9	BB/9	K/BB	HR/9	K%	BB%	WHIP	BABIP	RA	ERA-	FIP	FIP-	H/9	PRAA
1	Will White W. White	680.0	1.99	1879	CIN	76	43	31	.581	75	232	75	4	0	676	150	404	10	68		1	2,906	49	3.07	0.90	3.41	0.13	8.0	2.3	1.09		5.35	84	2.55	107	8.95	-25.2
2	Old Hoss Radbourn O. Hoss Radbourn	678.2	1.38	1884	PRO	75	59	12	.831	73	441	73	11	2	528	104	216	18	98		2	2,672	34	5.85	1.30	4.50	0.24	16.5	3.7	0.92		2.86	48	2.75	84	7.00	31.9
3	Guy Hecker G. Hecker	670.2	1.80	1884	LOU	75	52	20	.722	73	385	72	6	0	526	134	230	4	56	16	2	2,649	27	5.17	0.75	6.88	0.05	14.5	2.1	0.87	.239	3.09	57	2.53	80	7.06	43
4	Jim McCormick J. McCormick	657.2	1.85	1880	CLE	74	45	28	.616	74	260	72	7	0	585	135	274	2	75		0	2,669	21	3.56	1.03	3.47	0.03	9.7	2.8	1.00		3.75	81	2.12	93	8.01	4.6
5	Pud Galvin P. Galvin	656.1	2.72	1883	BUF	76	46	29	.613	75	279	72	5	0	676	198	367	9	50		1	2,741	28	3.83	0.69	5.58	0.12	10.2	1.8	1.11		5.03	85	2.81	88	9.27	32
6	Pud Galvin P. Galvin	636.1	1.99	1884	BUF	72	46	22	.676	72	369	71	12	0	566	141	254	23	63		0	2,554	16	5.22	0.89	5.86	0.33	14.4	2.5	0.99		3.59	64	2.88	82	8.01	50.9
7	Old Hoss Radbourn O. Hoss Radbourn	632.1	2.05	1883	PRO	76	48	25	.658	68	315	66	4	1	563	144	275	7	56		8	2,540	36	4.48	0.80	5.63	0.10	12.4	2.2	0.98		3.91	68	2.67	88	8.01	17.8
8	John Clarkson J. Clarkson	623.0	1.85	1885	CWS	70	53	16	.768	70	308	68	10	0	497	128	255	21	97		0	2,487	14	4.45	1.40	3.18	0.30	12.4	3.9	0.95		3.68	61	2.80	86	7.18	38.8
9	William Hutchinson W. Hutchinson	622.0	2.76	1892	CHI	75	36	36	.500	70	314	67	5	1	571	191	316	11	190	13	5	2,639	20	4.54	2.75	1.65	0.16	11.9	7.2	1.22	.265	4.57	82	2.63	79	8.26	51.2
10	Jim Devlin J. Devlin	622.0	1.56	1876	LOU	68	30	35	.462	68	122	66	5	0	566	108	309	3	37		0	2,568	14	1.77	0.54	3.30	0.04	4.8	1.4	0.97		4.47	62	2.08	82	8.19	50.7
11	John Clarkson J. Clarkson	620.0	2.73	1889	BSN	73	49	19	.721	72	284	68	8	1	589	188	280	16	203	17	1	2,641	16	4.12	2.95	1.40	0.23	10.8	7.7	1.28	.270	4.06	65	3.49	82	8.55	56.6
12	Tim Keefe T. Keefe	619.0	2.41	1883	NYM	68	41	27	.603	68	359	68	5	0	488	166	244	6	108		0	2,517	27	5.22	1.57	3.32	0.09	14.3	4.3	0.96		3.55	72	2.74	82	7.10	45.1
13	William Hutchinson W. Hutchinson	603.0	2.70	1890	CHN	71	41	25	.621	66	289	65	5	2	505	181	315	20	199	13	5	2,506	27	4.31	2.97	1.45	0.30	11.5	7.9	1.17	.244	4.70	71	3.44	84	7.54	50.1
14	Jim McCormick J. McCormick	595.2	2.37	1882	CLE	68	36	30	.545	67	200	65	4	0	550	157	274	14	103		1	2,412	22	3.02	1.56	1.94	0.21	8.3	4.3	1.10		4.14	84	2.92	106	8.31	-15.4
15	John Ward J. Ward	595.0	1.74	1880	PRO	70	39	24	.619	67	230	59	8	1	501	115	230	5	45		4	2,351	19	3.48	0.68	5.11	0.08	9.8	1.9	0.92		3.48	76	2.10	91	7.58	9.3
16	Pud Galvin P. Galvin	593.0	2.28	1879	BUF	66	37	27	.578	66	136	65	6	0	585	150	299	3	31		0	2,436	23	2.06	0.47	4.39	0.05	5.6	1.3	1.04		4.54	89	2.50	98	8.88	6.4
17	Lee Richmond L. Richmond	590.2	2.15	1880	WOR	74	32	32	.500	66	243	57	5	3	541	141	278	7	74		9	2,410	29	3.70	1.13	3.28	0.11	10.1	3.1	1.04		4.24	85	2.24	88	8.24	28.7
18	Matt Kilroy M. Kilroy	589.1	3.07	1887	BAL	69	46	19	.708	69	217	66	6	0	585	201	326	9	157	20	1	2,492	46	3.31	2.40	1.38	0.14	8.7	6.3	1.26	.276	4.98	73	3.64	90	8.93	23.3
19	Toad Ramsey T. Ramsey	588.2	2.45	1886	LOU	67	38	27	.585	67	499	66	3	0	447	160	297	3	207	12	0	2,477	35	7.63	3.16	2.41	0.05	20.1	8.4	1.11	.253	4.54	71	2.59	76	6.83	54.7
20	Charlie Buffinton C. Buffinton	587.0	2.15	1884	BSN	67	48	16	.750	67	417	63	8	0	506	140	225	15	76		0	2,383	24	6.39	1.17	5.49	0.23	17.5	3.2	0.99		3.45	74	2.57	77	7.76	46.8
21	John Ward J. Ward	587.0	2.15	1879	PRO	70	47	19	.712	60	239	58	2	1	571	140	270	5	36		10	2,425	29	3.66	0.55	6.64	0.08	9.9	1.5	1.03		4.14	89	2.22	92	8.75	7.9
22	Silver King S. King	584.2	1.63	1888	STL	66	45	20	.692	64	258	64	6	0	435	106	203	6	76	30	1	2,291	23	3.97	1.17	3.39	0.09	11.3	3.3	0.87	.223	3.12	50	2.38	76	6.70	55
23	Matt Kilroy M. Kilroy	583.0	3.37	1886	BAL	68	29	34	.460	68	513	66	5	0	476	218	350	10	182	19	0	2,469	61	7.92	2.81	2.82	0.15	20.8	7.4	1.13	.267	5.40	100	2.60	77	7.35	47
24	Ed Morris E. Morris	581.0	2.35	1885	PIT	63	39	24	.619	63	298	63	7	0	459	152	245	5	101	14	0	2,321	36	4.62	1.56	2.95	0.08	12.8	4.4	0.96	.239	3.80	77	2.56	90	7.11	10.9
25	Will White W. White	577.0	2.09	1883	CIN	65	43	22	.662	65	141	64	6	0	473	134	255	16	104		0	2,367	25	2.20	1.62	1.36	0.25	6.0	4.4	1.00		3.98	63	3.66	111	7.38	-23.9