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

Interpreted as:

Who had the best era with a minimum of 1 IP per team game in the nl in 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	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
5	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
6	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
7	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
8	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
9	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
10	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
11	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
12	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
13	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
14	Matt Garza M. Garza	3.32	2011	CHC	31	10	10	.500	31	197	2	0	0	198.0	186	73	90	14	63	3	0	5	839	6	8.95	2.86	3.13	0.64	23.5	7.5	1.26	.306	4.09	84	2.95	76	8.45	20.4
15	Jeff Karstens J. Karstens	3.38	2011	PIT	30	9	9	.500	26	96	1	1	0	162.1	163	61	69	22	33	4	1	6	668	4	5.32	1.83	2.91	1.22	14.4	4.9	1.21	.275	3.83	91	4.28	114	9.04	-9.6
16	Kyle Lohse K. Lohse	3.39	2011	STL	30	14	8	.636	30	111	1	1	0	188.1	178	71	80	16	42	3	0	1	775	1	5.30	2.01	2.64	0.76	14.3	5.4	1.17	.269	3.82	92	3.66	98	8.51	1.2
17	Chris Carpenter C. Carpenter	3.45	2011	STL	34	11	9	.550	34	191	4	2	0	237.1	243	91	98	16	55	6	0	5	996	3	7.24	2.09	3.47	0.61	19.2	5.5	1.26	.312	3.72	93	3.06	82	9.21	18
18	Mat Latos M. Latos	3.47	2011	SDP	31	9	14	.391	31	185	0	0	0	194.1	168	75	82	16	62	1	0	3	799	5	8.57	2.87	2.98	0.74	23.2	7.8	1.18	.284	3.80	99	3.16	85	7.78	12.5
19	Daniel Hudson D. Hudson	3.49	2011	ARI	33	16	12	.571	33	169	3	0	0	222.0	217	86	98	17	50	8	0	1	921	4	6.85	2.03	3.38	0.69	18.3	5.4	1.20	.295	3.97	88	3.27	84	8.80	14.9
20	Wandy Rodriguez W. Rodriguez	3.49	2011	HOU	30	11	11	.500	30	166	0	0	0	191.0	182	74	81	25	69	5	0	7	808	5	7.82	3.25	2.41	1.18	20.5	8.5	1.31	.289	3.82	92	4.14	107	8.58	-5.4
21	Yovani Gallardo Y. Gallardo	3.52	2011	MIL	33	17	10	.630	33	207	1	1	0	207.1	193	81	92	27	59	1	0	1	865	12	8.99	2.56	3.51	1.17	23.9	6.8	1.22	.291	3.99	91	3.58	90	8.38	8.7
22	Shaun Marcum S. Marcum	3.54	2011	MIL	33	13	7	.650	33	158	0	0	0	200.2	175	79	84	22	57	0	0	3	823	6	7.09	2.56	2.77	0.99	19.2	6.9	1.16	.261	3.77	92	3.72	94	7.85	5.4
23	Jaime Garcia J. Garcia	3.56	2011	STL	32	13	7	.650	32	156	2	2	0	194.2	207	77	100	15	50	2	0	2	826	12	7.21	2.31	3.12	0.69	18.9	6.1	1.32	.318	4.62	96	3.22	86	9.57	11.1
24	Jhoulys Chacin J. Chacin	3.62	2011	COL	31	11	14	.440	31	150	2	1	0	194.0	168	78	87	20	87	4	0	1	827	7	6.96	4.04	1.72	0.93	18.1	10.5	1.31	.261	4.04	83	4.22	103	7.79	-1.6
25	Aaron Harang A. Harang	3.64	2011	SDP	28	14	7	.667	28	124	0	0	0	170.2	175	69	73	20	58	3	0	4	719	3	6.54	3.06	2.14	1.05	17.2	8.1	1.37	.302	3.85	104	4.16	112	9.23	-8.7