Dennis Martinez had the lowest ERA in the NL in 1991, with an ERA of 2.39.

Interpreted as:

Who had the best era with a minimum of 1 IP per team game in the nl in 1991?

	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	Dennis Martinez D. Martinez	2.39	1991	MON	31	14	11	.560	31	123	9	5	0	222.0	187	59	70	9	62	4	0	3	905	3	4.99	2.51	1.98	0.36	13.6	6.9	1.12	.252	2.84	66	3.16	86	7.58	12.6
2	Jose Rijo J. Rijo	2.51	1991	CIN	30	15	6	.714	30	172	3	1	0	204.1	165	57	69	8	55	3	0	4	825	2	7.58	2.42	3.13	0.35	20.8	6.7	1.08	.267	3.04	67	2.53	65	7.27	30.2
3	Tom Glavine T. Glavine	2.55	1991	ATL	34	20	11	.645	34	192	9	1	0	246.2	201	70	83	17	69	2	0	6	989	10	7.01	2.52	2.78	0.62	19.4	7.0	1.09	.260	3.03	67	3.05	80	7.33	20.8
4	Tim Belcher T. Belcher	2.62	1991	LAD	33	10	9	.526	33	156	2	1	0	209.1	189	61	76	10	75	2	0	3	880	7	6.71	3.22	2.08	0.43	17.7	8.5	1.26	.281	3.27	73	3.08	84	8.13	13.7
5	Pete Harnisch P. Harnisch	2.70	1991	HOU	33	12	9	.571	33	172	4	2	0	216.2	169	65	71	14	83	5	0	3	900	5	7.14	3.45	2.07	0.58	19.1	9.2	1.16	.248	2.95	76	3.32	93	7.02	5.5
6	Jose DeLeon J. DeLeon	2.71	1991	STL	28	5	9	.357	28	118	1	0	0	162.2	144	49	57	15	61	6	0	1	679	1	6.53	3.38	1.93	0.83	17.4	9.0	1.26	.269	3.15	74	3.83	103	7.97	-2.4
7	Mike Morgan M. Morgan	2.78	1991	LAD	34	14	10	.583	33	140	5	1	1	236.1	197	73	85	12	61	3	1	10	949	6	5.33	2.32	2.30	0.46	14.8	6.4	1.09	.252	3.24	78	3.14	85	7.50	14
8	Randy Tomlin R. Tomlin	2.98	1991	PIT	31	8	7	.533	27	104	4	2	0	175.0	170	58	75	9	54	6	0	4	736	2	5.35	2.78	1.93	0.46	14.1	7.3	1.28	.286	3.86	83	3.36	91	8.74	6.8
9	Andy Benes A. Benes	3.03	1991	SDP	33	15	11	.577	33	167	4	1	0	223.0	194	75	76	23	59	4	0	7	908	3	6.74	2.38	2.83	0.93	18.4	6.5	1.13	.261	3.07	81	3.54	92	7.83	7.9
10	Doug Drabek D. Drabek	3.07	1991	PIT	35	15	14	.517	35	142	5	2	0	234.2	245	80	92	16	62	3	0	6	977	5	5.45	2.38	2.29	0.61	14.5	6.3	1.31	.304	3.53	85	3.36	91	9.40	9.1
11	John Smiley J. Smiley	3.08	1991	PIT	33	20	8	.714	32	129	2	1	0	207.2	194	71	78	17	44	3	0	0	836	3	5.59	1.91	2.93	0.74	15.4	5.3	1.15	.275	3.38	85	3.35	90	8.41	8.2
12	Bob Ojeda B. Ojeda	3.18	1991	LAD	31	12	9	.571	31	120	2	1	0	189.1	181	67	78	15	70	3	0	9	802	4	5.70	3.33	1.71	0.71	15.0	8.7	1.33	.279	3.71	89	3.77	103	8.60	-2.3
13	Zane Smith Z. Smith	3.20	1991	PIT	35	16	10	.615	35	120	6	3	0	228.0	234	81	95	15	29	2	0	3	916	1	4.74	1.14	4.14	0.59	13.1	3.2	1.15	.292	3.75	89	3.06	83	9.24	16.4
14	Bob Tewksbury B. Tewksbury	3.25	1991	STL	30	11	12	.478	30	75	3	0	0	191.0	206	69	86	13	38	5	0	2	798	0	3.53	1.79	1.97	0.61	9.4	4.8	1.28	.289	4.05	89	3.62	98	9.71	1.7
15	Ramon Martinez R. Martinez	3.27	1991	LAD	33	17	13	.567	33	150	6	4	0	220.1	190	80	89	18	69	7	0	4	916	6	6.13	2.82	2.17	0.74	16.4	7.5	1.18	.256	3.64	91	3.59	98	7.76	1.9
16	David Cone D. Cone	3.29	1991	NYM	34	14	14	.500	34	241	5	2	0	232.2	204	85	95	13	73	5	0	2	966	17	9.32	2.82	3.30	0.50	24.9	7.6	1.19	.301	3.67	91	2.51	68	7.89	31.2
17	Bruce Hurst B. Hurst	3.29	1991	SDP	31	15	8	.652	31	141	4	0	0	221.2	201	81	89	17	59	3	0	3	909	5	5.72	2.40	2.39	0.69	15.5	6.5	1.17	.267	3.61	88	3.41	89	8.16	10.9
18	Greg Maddux G. Maddux	3.35	1991	CHC	37	15	11	.577	37	198	7	2	0	263.0	232	98	113	18	66	6	0	9	1,070	6	6.78	2.26	3.00	0.62	18.5	6.2	1.13	.274	3.87	87	3.06	79	7.94	23.1
19	Steve Avery S. Avery	3.38	1991	ATL	35	18	8	.692	35	137	3	1	0	210.1	189	79	89	21	65	3	0	0	868	4	5.86	2.78	2.11	0.90	15.8	7.5	1.21	.262	3.81	88	3.82	100	8.09	0.3
20	Tommy Greene T. Greene	3.38	1991	PHI	36	13	7	.650	27	154	3	2	0	207.2	177	78	85	19	66	3	3	4	857	9	6.67	2.86	2.33	0.82	18.0	7.7	1.17	.257	3.68	92	3.55	95	7.67	4.4
21	Jose De Jesus J. De Jesus	3.42	1991	PHI	31	10	9	.526	29	118	3	0	1	181.2	147	69	74	7	128	4	1	4	801	10	5.85	6.34	0.92	0.35	14.7	16.0	1.51	.257	3.67	93	4.23	113	7.28	-9.8
22	Charlie Leibrandt C. Leibrandt	3.49	1991	ATL	36	15	13	.536	36	128	1	1	0	229.2	212	89	105	18	56	4	0	3	949	5	5.02	2.19	2.29	0.71	13.5	5.9	1.17	.261	4.11	91	3.54	93	8.31	7.3
23	Trevor Wilson T. Wilson	3.56	1991	SFG	44	13	11	.542	29	139	2	1	0	202.0	173	80	87	13	77	5	6	4	841	5	6.19	3.43	1.81	0.58	16.5	9.2	1.24	.264	3.88	101	3.53	95	7.71	4
24	Ken Hill K. Hill	3.57	1991	STL	30	11	10	.524	30	121	0	0	0	181.1	147	72	76	15	67	6	0	4	743	7	6.01	3.33	1.81	0.74	16.3	9.0	1.18	.247	3.77	98	3.80	102	7.30	-1.9
25	Dwight Gooden D. Gooden	3.60	1991	NYM	27	13	7	.650	27	150	3	1	0	190.0	185	76	80	12	56	3	0	2	789	5	7.11	2.65	2.68	0.57	19.0	7.1	1.27	.305	3.79	100	3.02	82	8.76	14.5