lowest earned run average with at least 20 innings pitched in 2011

Eric O'Flaherty had the lowest ERA with 20.0+ innings pitched in 2011, with an ERA of 0.98.

Interpreted as:

lowest earned run average by a player with at least 20 innings pitched in 2011

	NAME	ERA	IP	SEASON	TM	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	ERA-	FIP	FIP-	H/9	PRAA
1	Eric O'Flaherty E. O'Flaherty	0.98	73.2	2011	ATL	78	2	4	.333	0	67	0	0	0	59	8	9	2	21	3	5	8	301	1	8.19	2.57	3.19	0.24	22.3	7.0	1.09	.274	1.10	26	2.53	67	7.21	10.3
2	David Robertson D. Robertson	1.08	66.2	2011	NYY	70	4	0	1.000	0	100	0	0	1	40	8	9	1	35	1	8	6	272	6	13.50	4.72	2.86	0.14	36.8	12.9	1.13	.289	1.21	26	1.83	44	5.40	17
3	Scott Downs S. Downs	1.34	53.2	2011	LAA	60	6	3	.667	0	35	0	0	1	39	8	11	3	15	0	10	3	218	2	5.87	2.52	2.33	0.50	16.1	6.9	1.01	.218	1.84	34	3.28	83	6.54	4.1
4	Mike Adams M. Adams	1.47	73.2	2011	TOT	75	5	4	.556	0	74	0	0	2	44	12	13	5	14	0	10	2	277	0	9.04	1.71	5.29	0.61	26.7	5.1	0.79	.212	1.59	38	2.46	63	5.38	11.8
5	Sergio Romo S. Romo	1.50	48.0	2011	SFG	65	3	1	.750	0	70	0	0	1	29	8	8	2	5	0	16	1	175	0	13.13	0.94	14.00	0.38	40.0	2.9	0.71	.276	1.50	42	0.96	26	5.44	15.1
6	Stephen Strasburg S. Strasburg	1.50	24.0	2011	WSH	5	1	1	.500	5	24	0	0	0	15	4	5	0	2	0	0	0	88	0	9.00	0.75	12.00	0.00	27.3	2.3	0.71	.242	1.88	39	1.27	33	5.63	6.9
7	Josh Johnson J. Johnson	1.64	60.1	2011	FLA	9	3	1	.750	9	56	0	0	0	39	11	13	2	20	1	0	2	234	2	8.35	2.98	2.80	0.30	23.9	8.5	0.98	.239	1.94	43	2.64	70	5.82	7.7
8	Anthony Bass A. Bass	1.68	48.1	2011	SDP	27	2	0	1.000	3	24	0	0	0	41	9	9	3	21	1	6	1	198	1	4.47	3.91	1.14	0.56	12.1	10.6	1.28	.255	1.68	48	4.20	113	7.63	-2.7
9	Santiago Casilla S. Casilla	1.74	51.2	2011	SFG	49	2	2	.500	0	45	0	0	6	33	10	11	1	25	2	20	1	211	5	7.84	4.35	1.80	0.17	21.3	11.8	1.12	.232	1.92	49	3.10	84	5.75	3.5
10	Edgmer Escalona E. Escalona	1.75	25.2	2011	COL	14	0	0		0	14	0	0	0	17	5	5	3	7	0	5	2	99	0	4.91	2.45	2.00	1.05	14.1	7.1	0.94	.187	1.75	40	4.26	104	5.96	-0.3
11	Greg Holland G. Holland	1.80	60.0	2011	KCR	46	5	1	.833	0	74	0	0	4	37	12	13	3	19	1	15	3	233	7	11.10	2.85	3.89	0.45	31.8	8.2	0.93	.250	1.95	43	2.20	55	5.55	12.1
12	Eduardo Sanchez E. Sanchez	1.80	30.0	2011	STL	26	3	1	.750	0	35	0	0	5	14	6	6	1	16	3	11	0	118	5	10.50	4.80	2.19	0.30	29.7	13.6	1.00	.206	1.80	49	3.02	81	4.20	2.4
13	Randy Choate R. Choate	1.82	24.2	2011	FLA	54	1	1	.500	0	31	0	0	0	13	5	7	3	13	2	6	5	103	0	11.31	4.74	2.38	1.09	30.1	12.6	1.05	.185	2.55	47	3.91	104	4.74	-0.4
14	Tyler Clippard T. Clippard	1.83	88.1	2011	WSH	72	3	0	1.000	0	104	0	0	0	48	18	18	11	26	0	8	2	329	1	10.60	2.65	4.00	1.12	31.6	7.9	0.84	.197	1.83	48	3.17	82	4.89	6.7
15	Joel Hanrahan J. Hanrahan	1.83	68.2	2011	PIT	70	1	4	.200	0	61	0	0	40	56	14	17	1	16	1	59	2	274	6	8.00	2.10	3.81	0.13	22.3	5.8	1.05	.282	2.23	50	2.17	58	7.34	12.3
16	Jonny Venters J. Venters	1.84	88.0	2011	ATL	85	6	2	.750	0	96	0	0	5	53	18	19	2	43	5	10	7	357	4	9.82	4.40	2.23	0.20	26.9	12.0	1.09	.242	1.94	49	2.77	73	5.42	9.9
17	Al Alburquerque A. Alburquerque	1.87	43.1	2011	DET	41	6	1	.857	0	67	0	0	0	21	9	9	0	29	2	11	4	182	4	13.92	6.02	2.31	0.00	36.8	15.9	1.15	.250	1.87	45	2.07	51	4.36	9.5
18	Chris Young C. Young	1.88	24.0	2011	NYM	4	1	0	1.000	4	22	0	0	0	12	5	5	3	11	1	0	0	95	0	8.25	4.13	2.00	1.13	23.2	11.6	0.96	.155	1.88	51	4.31	114	4.50	-1.5
19	Mariano Rivera M. Rivera	1.91	61.1	2011	NYY	64	1	2	.333	0	60	0	0	44	47	13	13	3	8	2	54	2	233	1	8.80	1.17	7.50	0.44	25.8	3.4	0.90	.275	1.91	45	2.19	52	6.90	13.3
20	John Axford J. Axford	1.95	73.2	2011	MIL	74	2	2	.500	0	86	0	0	46	59	16	19	4	25	0	63	1	305	8	10.51	3.05	3.44	0.49	28.2	8.2	1.14	.289	2.32	51	2.41	61	7.21	12.4
21	Joe Smith J. Smith	2.01	67.0	2011	CLE	71	3	3	.500	0	45	0	0	0	52	15	16	1	21	2	13	1	267	2	6.04	2.82	2.14	0.13	16.9	7.9	1.09	.258	2.15	51	2.90	73	6.99	8
22	Takashi Saito T. Saito	2.03	26.2	2011	MIL	30	4	2	.667	0	23	0	0	0	21	6	6	2	9	1	5	2	108	2	7.76	3.04	2.56	0.68	21.3	8.3	1.13	.260	2.03	53	3.39	86	7.09	1.7
23	Cory Wade C. Wade	2.04	39.2	2011	NYY	40	6	1	.857	0	30	0	0	0	33	9	10	5	8	0	8	0	157	1	6.81	1.82	3.75	1.13	19.1	5.1	1.03	.246	2.27	49	3.75	89	7.49	2
24	Pedro Strop P. Strop	2.05	22.0	2011	TOT	23	2	1	.667	0	21	0	0	0	15	5	5	0	10	1	6	0	90	2	8.59	4.09	2.10	0.00	23.3	11.1	1.14	.259	2.05	48	2.61	62	6.14	3.7
25	Mike MacDougal M. MacDougal	2.05	57.0	2011	LAD	69	3	1	.750	0	41	0	0	1	54	13	16	3	29	3	14	3	247	3	6.47	4.58	1.41	0.47	16.6	11.7	1.46	.298	2.53	57	3.95	104	8.53	-0.9