Clayton Kershaw had the best ERA in 2011, with an ERA of 2.28.

Interpreted as:

lowest era with a minimum of 1 IP per team game by a player 2011

	NAME	ERA	SEASON	TM	G	W	L	W%	GS	SO	CG	SHO	SV	IP	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	Clayton Kershaw C. Kershaw	2.28	2011	LAD	33	21	5	.808	33	248	5	2	0	233.1	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
2	Roy Halladay R. Halladay	2.35	2011	PHI	32	19	6	.760	32	220	8	1	0	233.2	208	61	65	10	35	4	0	4	933	2	8.47	1.35	6.29	0.39	23.6	3.8	1.04	.298	2.50	61	2.19	56	8.01	43.5
3	Cliff Lee C. Lee	2.40	2011	PHI	32	17	8	.680	32	238	6	6	0	232.2	197	62	66	18	42	6	0	0	920	0	9.21	1.62	5.67	0.70	25.9	4.6	1.03	.291	2.55	62	2.60	67	7.62	33
4	Justin Verlander J. Verlander	2.40	2011	DET	34	24	5	.828	34	250	4	2	0	251.0	174	67	73	24	57	3	0	0	969	7	8.96	2.04	4.39	0.86	25.8	5.9	0.92	.236	2.62	58	2.99	74	6.24	29.4
5	Jered Weaver J. Weaver	2.41	2011	LAA	33	18	8	.692	33	198	4	2	0	235.2	182	63	65	20	56	3	0	0	926	8	7.56	2.14	3.54	0.76	21.4	6.0	1.01	.250	2.48	61	3.19	81	6.95	20.3
6	Ryan Vogelsong R. Vogelsong	2.71	2011	SFG	30	13	7	.650	28	139	1	1	0	179.2	164	54	62	15	61	5	1	6	752	1	6.96	3.06	2.28	0.75	18.5	8.1	1.25	.280	3.11	76	3.66	99	8.22	0.4
7	Tim Lincecum T. Lincecum	2.74	2011	SFG	33	13	14	.481	33	220	1	1	0	217.0	176	66	74	15	86	6	0	5	900	9	9.12	3.57	2.56	0.62	24.4	9.6	1.21	.281	3.07	76	3.16	86	7.30	12.9
8	Cole Hamels C. Hamels	2.79	2011	PHI	32	14	9	.609	31	194	3	0	0	216.0	169	67	68	19	44	5	0	2	850	3	8.08	1.83	4.41	0.79	22.8	5.2	0.99	.255	2.83	73	3.05	78	7.04	20
9	James Shields J. Shields	2.82	2011	TBR	33	16	12	.571	33	225	11	4	0	249.1	195	78	83	26	65	5	0	1	975	4	8.12	2.35	3.46	0.94	23.1	6.7	1.04	.258	3.00	73	3.41	86	7.04	15.3
10	Doug Fister D. Fister	2.83	2011	TOT	32	11	13	.458	31	146	3	0	0	216.1	193	68	76	11	37	12	0	2	875	3	6.07	1.54	3.95	0.46	16.7	4.2	1.06	.272	3.16	73	3.01	76	8.03	23
11	Ian Kennedy I. Kennedy	2.88	2011	ARI	33	21	4	.840	33	198	1	1	0	222.0	186	71	73	19	55	9	0	0	900	11	8.03	2.23	3.60	0.77	22.0	6.1	1.09	.270	2.96	73	3.21	83	7.54	16.5
12	Matt Cain M. Cain	2.88	2011	SFG	33	12	11	.522	33	179	1	0	0	221.2	177	71	82	9	63	9	0	5	907	4	7.27	2.56	2.84	0.37	19.7	6.9	1.08	.260	3.33	80	2.91	79	7.19	19.8
13	Josh Beckett J. Beckett	2.89	2011	BOS	30	13	7	.650	30	175	1	1	0	193.0	146	62	65	21	52	9	0	1	767	6	8.16	2.42	3.37	0.98	22.8	6.8	1.03	.245	3.03	68	3.57	90	6.81	8.4
14	Ricky Romero R. Romero	2.92	2011	TOR	32	15	11	.577	32	178	4	2	0	225.0	176	73	85	26	80	14	0	2	917	9	7.12	3.20	2.23	1.04	19.4	8.7	1.14	.242	3.40	70	4.19	102	7.04	-1.6
15	C.J. Wilson	2.94	2011	TEX	34	16	7	.696	34	206	3	1	0	223.1	191	73	89	16	74	10	0	0	915	6	8.30	2.98	2.78	0.64	22.5	8.1	1.19	.287	3.59	68	3.23	78	7.70	22.6
16	Jeremy Hellickson J. Hellickson	2.95	2011	TBR	29	13	10	.565	29	117	2	1	0	189.0	146	62	64	21	72	4	0	8	774	8	5.57	3.43	1.63	1.00	15.1	9.3	1.15	.223	3.05	76	4.43	112	6.95	-10.3
17	CC Sabathia	3.00	2011	NYY	33	19	8	.704	33	230	3	1	0	237.1	230	79	87	17	61	7	0	4	985	2	8.72	2.31	3.77	0.64	23.4	6.2	1.23	.318	3.30	71	2.87	68	8.72	34.1
18	Hiroki Kuroda H. Kuroda	3.07	2011	LAD	32	13	16	.448	32	161	0	0	0	202.0	196	69	77	24	49	5	0	6	838	12	7.17	2.18	3.29	1.07	19.2	5.8	1.21	.287	3.43	85	3.77	99	8.73	0.7
19	Gio Gonzalez G. Gonzalez	3.12	2011	OAK	32	16	12	.571	32	197	0	0	0	202.0	175	70	81	17	91	8	0	1	864	6	8.78	4.05	2.16	0.76	22.8	10.5	1.32	.287	3.61	79	3.63	92	7.80	7.3
20	Dan Haren D. Haren	3.17	2011	LAA	35	16	10	.615	34	192	4	3	0	238.1	211	84	91	20	33	5	1	1	953	6	7.25	1.25	5.82	0.76	20.1	3.5	1.02	.272	3.44	81	2.98	75	7.97	26.4
21	Jordan Zimmermann J. Zimmermann	3.18	2011	WSH	26	8	11	.421	26	124	1	0	0	161.1	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
22	Justin Masterson J. Masterson	3.21	2011	CLE	34	12	10	.545	33	158	1	0	0	216.0	211	77	89	11	65	11	0	4	908	5	6.58	2.71	2.43	0.46	17.4	7.2	1.28	.302	3.71	82	3.27	83	8.79	16.6
23	Madison Bumgarner M. Bumgarner	3.21	2011	SFG	33	13	13	.500	33	191	0	0	0	204.2	202	73	82	12	46	5	0	5	844	0	8.40	2.02	4.15	0.53	22.6	5.5	1.21	.322	3.61	90	2.66	72	8.88	24
24	Tim Hudson T. Hudson	3.22	2011	ATL	33	16	10	.615	33	158	1	1	0	215.0	189	77	86	14	56	15	0	6	884	10	6.61	2.34	2.82	0.59	17.9	6.3	1.14	.273	3.60	85	3.39	90	7.91	9.1
25	R.A. Dickey	3.28	2011	NYM	33	8	13	.381	32	134	1	0	0	208.2	202	76	85	18	54	9	0	2	876	9	5.78	2.33	2.48	0.78	15.3	6.2	1.23	.278	3.67	89	3.76	100	8.71	0