lowest earned run in a season with minimum 100 innings pitched

Tim Keefe has given up the fewest earned runs with 100.0+ innings pitched in a season, with 10 earned runs in his rookie season in 1880.

Interpreted as:

lowest earned run by a player in a season with minimum 100 innings pitched

	NAME	ER	IP	SEASON	TM	G	W	L	W%	GS	ERA	SO	CG	SHO	SV	H	R	HR	BB	HBP	GF	IBB	TBF	WP	K/9	BB/9	K/BB	HR/9	K%	BB%	WHIP	BABIP	RA	ERA-	FIP	FIP-	H/9	PRAA
1	Tim Keefe T. Keefe	10	105.0	1880	TRO	12	6	6	.500	12	0.86	39	12	0	0	68	27	0	16		0		397	1	3.34	1.37	2.44	0.00	9.8	4.0	0.80		2.31	35	2.25	91	5.83	3.6
2	Ferdie Schupp F. Schupp	14	140.1	1916	NYG	30	9	3	.750	11	0.90	86	8	4	1	79	22	1	37	5	17		525	2	5.52	2.37	2.32	0.06	16.4	7.0	0.83	.197	1.41	36	2.08	84	5.07	6.1
3	Ted Abernathy T. Abernathy	15	106.1	1967	CIN	70	6	3	.667	0	1.27	88	0	0	28	63	19	1	41	5	61	5	427	1	7.45	3.47	2.15	0.08	20.6	9.6	0.98	.212	1.61	35	2.30	66	5.33	13.4
4	Guy Hecker G. Hecker	15	104.0	1882	LOU	13	6	6	.500	11	1.30	33	10	0	0	75	49	0	5		1		403	7	2.86	0.43	6.60	0.00	8.2	1.2	0.77		4.24	49	2.27	82	6.49	5.1
5	Ranger Suárez R. Suárez	16	106.0	2021	PHI	39	8	5	.615	12	1.36	107	1	1	4	73	20	4	33	5	13	3	418	1	9.08	2.80	3.24	0.34	25.6	7.9	1.00	.257	1.70	32	2.71	63	6.20	18.7
6	Mel Rojas M. Rojas	16	100.2	1992	MON	68	7	1	.875	0	1.43	70	0	0	10	71	17	2	34	2	26	8	399	2	6.26	3.04	2.06	0.18	17.5	8.5	1.04	.237	1.52	42	2.72	79	6.35	8.2
7	Bruce Sutter B. Sutter	16	107.1	1977	CHC	62	7	3	.700	0	1.34	129	0	0	31	69	21	5	23	1	48	7	411	7	10.82	1.93	5.61	0.42	31.4	5.6	0.86	.253	1.76	31	1.60	38	5.79	29.2
8	Babe Adams B. Adams	16	130.0	1909	PIT	25	12	3	.800	12	1.11	65	7	3	2	88	25	0	23	3	11		475	1	4.50	1.59	2.83	0.00	13.7	4.8	0.85	.229	1.73	43	1.82	69	6.09	11.7
9	Jesse Orosco J. Orosco	18	110.0	1983	NYM	62	13	7	.650	0	1.47	84	0	0	17	76	27	3	38	1	42	7	432	1	6.87	3.11	2.21	0.25	19.4	8.8	1.04	.239	2.21	41	2.63	73	6.22	12.3
10	Red Munger R. Munger	18	121.0	1944	SLN	21	11	3	.786	12	1.34	55	7	2	2	92	23	2	41	2	8		479	0	4.09	3.05	1.34	0.15	11.5	8.6	1.10	.237	1.71	37	2.91	80	6.84	9.5
11	Lee Smith L. Smith	19	103.1	1983	CHC	66	4	10	.286	0	1.65	91	0	0	29	70	23	5	41	1	56	14	413	5	7.93	3.57	2.22	0.44	22.0	9.9	1.07	.236	2.00	43	2.83	72	6.10	12.2
12	George Witt G. Witt	19	106.0	1958	PIT	18	9	2	.818	15	1.61	81	5	3	0	78	22	2	59	2	0	3	442	5	6.88	5.01	1.37	0.17	18.3	13.3	1.29	.255	1.87	42	2.92	76	6.62	11
13	Clark Griffith C. Griffith	19	101.2	1905	NYH	25	9	6	.600	7	1.68	46	4	2	1	82	30	1	15	1	17		384	3	4.07	1.33	3.07	0.09	12.0	3.9	0.95	.252	2.66	59	2.22	76	7.26	8.4
14	Cal Eldred C. Eldred	20	100.1	1992	MIL	14	11	2	.846	14	1.79	62	2	1	0	76	21	4	23	2	0	0	394	3	5.56	2.06	2.70	0.36	15.7	5.8	0.99	.238	1.88	46	2.81	72	6.82	12.2
15	Rod Scurry R. Scurry	20	103.2	1982	PIT	76	4	5	.444	0	1.74	94	0	0	14	79	26	3	64	4	38	7	448	12	8.16	5.56	1.47	0.26	21.0	14.3	1.38	.269	2.26	48	3.24	90	6.86	4.2
16	John Hiller J. Hiller	20	125.1	1973	DET	65	10	5	.667	0	1.44	124	0	0	38	89	21	7	39	0	60	7	498	1	8.90	2.80	3.18	0.50	24.9	7.8	1.02	.250	1.51	37	2.24	57	6.39	22.8
17	Tug McGraw T. McGraw	20	106.0	1972	NYM	54	8	6	.571	0	1.70	92	0	0	27	71	26	3	40	3	47	11	419	2	7.81	3.40	2.30	0.25	22.0	9.5	1.05	.242	2.21	50	2.24	69	6.03	12.1
18	Dick Hyde D. Hyde	20	103.0	1958	WSH	53	10	3	.769	0	1.75	49	0	0	19	82	26	1	35	2	44	7	416	2	4.28	3.06	1.40	0.09	11.8	8.4	1.14	.246	2.27	45	2.73	70	7.17	13
19	Jack Pfiester J. Pfiester	20	100.1	1910	CHC	14	6	3	.667	13	1.79	34	5	2	0	82	28	0	26	1	0		391	0	3.05	2.33	1.31	0.00	8.7	6.6	1.08	.248	2.51	60	2.45	84	7.36	5.2
20	Clay Buchholz C. Buchholz	21	108.1	2013	BOS	16	12	1	.923	16	1.74	96	1	1	0	75	23	4	36	1	0	0	416	1	7.98	2.99	2.67	0.33	23.1	8.7	1.02	.254	1.91	42	2.78	71	6.23	13.5
21	Bruce Sutter B. Sutter	21	122.2	1984	STL	71	5	7	.417	0	1.54	77	0	0	45	109	26	9	23	1	63	4	477	2	5.65	1.69	3.35	0.66	16.1	4.8	1.08	.272	1.91	43	3.05	87	8.00	6
22	Sparky Lyle S. Lyle	21	114.0	1974	NYY	66	9	3	.750	0	1.66	89	0	0	15	93	30	6	43	1	59	7	469	7	7.03	3.39	2.07	0.47	19.0	9.2	1.19	.264	2.37	47	2.85	80	7.34	8.9
23	Tug McGraw T. McGraw	21	111.0	1971	NYM	51	11	4	.733	1	1.70	109	0	0	8	73	22	4	41	3	34	11	441	6	8.84	3.32	2.66	0.32	24.7	9.3	1.03	.243	1.78	50	2.14	65	5.92	14.6
24	Ron Kline R. Kline	21	112.2	1968	PIT	56	12	5	.706	0	1.68	48	0	0	7	94	26	3	31	2	31	11	449	0	3.83	2.48	1.55	0.24	10.7	6.9	1.11	.249	2.08	57	2.76	99	7.51	0.4
25	Phil Regan P. Regan	21	116.2	1966	LAD	65	14	1	.933	0	1.62	88	0	0	21	85	24	6	24	0	48	9	445	4	6.79	1.85	3.67	0.46	19.8	5.4	0.93	.242	1.85	49	2.33	73	6.56	11.4