lowest earned run average with at least 50 innings pitched in 2011

Eric O'Flaherty had the lowest ERA with 50.0+ innings pitched in 2011, with an ERA of 0.98.

Interpreted as:

lowest earned run average by a player with at least 50 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	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
6	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
7	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
8	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
9	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
10	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
11	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
12	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
13	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
14	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
15	Luis Ayala L. Ayala	2.09	56.0	2011	NYY	52	2	2	.500	0	39	0	0	0	51	13	17	5	20	6	20	3	233	2	6.27	3.21	1.95	0.80	16.7	8.6	1.27	.282	2.73	50	4.18	99	8.20	0.2
16	Craig Kimbrel C. Kimbrel	2.10	77.0	2011	ATL	79	4	3	.571	0	127	0	0	46	48	18	19	3	32	1	64	1	306	4	14.84	3.74	3.97	0.35	41.5	10.5	1.04	.315	2.22	56	1.51	40	5.61	19.6
17	Brad Ziegler B. Ziegler	2.16	58.1	2011	TOT	66	3	2	.600	0	44	0	0	1	53	14	21	0	19	1	16	3	239	1	6.79	2.93	2.32	0.00	18.4	7.9	1.23	.303	3.24	55	2.54	65	8.18	9.1
18	J.J. Putz	2.17	58.0	2011	ARI	60	2	2	.500	0	61	0	0	45	41	14	15	4	12	2	52	0	229	2	9.47	1.86	5.08	0.62	26.6	5.2	0.91	.247	2.33	55	2.54	65	6.36	8.6
19	Kyle Farnsworth K. Farnsworth	2.18	57.2	2011	TBR	63	5	1	.833	0	51	0	0	25	45	14	15	5	12	3	51	1	231	2	7.96	1.87	4.25	0.78	22.1	5.2	0.99	.250	2.34	56	3.16	80	7.02	5.2
20	Jose Valverde J. Valverde	2.24	72.1	2011	DET	75	2	4	.333	0	69	0	0	49	52	18	21	5	34	3	70	4	301	3	8.59	4.23	2.03	0.62	22.9	11.3	1.19	.247	2.61	54	3.54	88	6.47	4
21	Jason Motte J. Motte	2.25	68.0	2011	STL	78	5	2	.714	0	63	0	0	9	49	17	22	2	16	5	27	2	268	1	8.34	2.12	3.94	0.26	23.5	6.0	0.96	.258	2.91	61	2.47	66	6.49	9.7
22	Sean Marshall S. Marshall	2.26	75.2	2011	CHC	78	6	6	.500	0	79	0	0	5	66	19	21	1	17	2	18	4	307	0	9.40	2.02	4.65	0.12	25.7	5.5	1.10	.313	2.50	57	1.86	48	7.85	16.9
23	Casey Janssen C. Janssen	2.26	55.2	2011	TOR	55	6	0	1.000	0	53	0	0	2	47	14	14	2	14	2	11	1	223	2	8.57	2.26	3.79	0.32	23.8	6.3	1.10	.296	2.26	54	2.44	59	7.60	10.2
24	Clayton Kershaw C. Kershaw	2.28	233.1	2011	LAD	33	21	5	.808	33	248	5	2	0	174	59	66	15	54	3	0	2	912	5	9.57	2.08	4.59	0.58	27.2	5.9	0.98	.269	2.55	63	2.46	65	6.71	35.1
25	Fernando Salas F. Salas	2.28	75.0	2011	STL	68	5	6	.455	0	75	0	0	24	50	19	20	7	21	2	46	3	295	2	9.00	2.52	3.57	0.84	25.4	7.1	0.95	.226	2.40	62	3.15	85	6.00	4.9