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

Tyler Clippard had the lowest ERA for the Nationals with 50.0+ innings pitched in 2011, with an ERA of 1.83.

	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	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
2	Drew Storen D. Storen	2.75	75.1	2011	WSH	73	6	3	.667	0	74	0	0	43	57	23	24	8	20	2	52	4	303	2	8.84	2.39	3.70	0.96	24.4	6.6	1.02	.246	2.87	72	3.31	86	6.81	4.5
3	Ross Detwiler R. Detwiler	3.00	66.0	2011	WSH	15	4	5	.444	10	41	0	0	0	63	22	26	7	20	3	0	2	277	2	5.59	2.73	2.05	0.95	14.8	7.2	1.26	.272	3.55	79	4.20	109	8.59	-2.6
4	Jordan Zimmermann J. Zimmermann	3.18	161.1	2011	WSH	26	8	11	.421	26	124	1	0	0	154	57	62	12	31	7	0	2	662	3	6.92	1.73	4.00	0.67	18.7	4.7	1.15	.291	3.46	83	3.15	82	8.59	12.4
5	Henry Rodriguez H. Rodriguez	3.56	65.2	2011	WSH	59	3	3	.500	0	70	0	0	2	54	26	30	1	45	2	21	1	295	14	9.59	6.17	1.56	0.14	23.7	15.3	1.51	.299	4.11	94	3.23	84	7.40	4.5
6	Todd Coffey T. Coffey	3.62	59.2	2011	WSH	69	5	1	.833	0	46	0	0	0	55	24	25	4	20	1	15	3	254	1	6.94	3.02	2.30	0.60	18.1	7.9	1.26	.279	3.77	95	3.40	89	8.30	2.9
7	John Lannan J. Lannan	3.70	184.2	2011	WSH	33	10	13	.435	33	106	0	0	0	194	76	90	15	76	7	0	3	808	4	5.17	3.70	1.39	0.73	13.1	9.4	1.46	.296	4.39	97	4.27	111	9.45	-8.8
8	Sean Burnett S. Burnett	3.81	56.2	2011	WSH	69	5	5	.500	0	33	0	0	4	54	24	24	6	21	3	17	4	242	2	5.24	3.34	1.57	0.95	13.6	8.7	1.32	.268	3.81	100	4.50	117	8.58	-4.1
9	Jason Marquis J. Marquis	3.95	120.2	2011	WSH	20	8	5	.615	20	71	1	1	0	132	53	58	8	39	4	0	1	524	1	5.30	2.91	1.82	0.60	13.5	7.4	1.42	.308	4.33	104	3.77	98	9.85	1
10	Tom Gorzelanny T. Gorzelanny	4.03	105.0	2011	WSH	30	4	6	.400	15	95	0	0	0	102	47	50	15	33	6	1	5	447	5	8.14	2.83	2.88	1.29	21.3	7.4	1.29	.292	4.29	106	4.18	109	8.74	-3.9
11	Chien-Ming Wang C. Wang	4.04	62.1	2011	WSH	11	4	3	.571	11	25	0	0	0	67	28	35	8	13	1	0	0	264	2	3.61	1.88	1.92	1.16	9.5	4.9	1.28	.272	5.05	106	4.56	119	9.67	-4.9
12	Livan Hernandez L. Hernandez	4.47	175.1	2011	WSH	29	8	13	.381	29	99	1	1	0	199	87	98	16	46	5	0	6	751	3	5.08	2.36	2.15	0.82	13.2	6.1	1.40	.313	5.03	117	3.95	103	10.21	-2