Tom Seaver had the lowest ERA in the NL in 1973, with an ERA of 2.08.

Interpreted as:

Who had the best era with a minimum of 1 IP per team game in the nl in 1973?

	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	Tom Seaver T. Seaver	2.08	1973	NYM	36	19	10	.655	36	251	18	3	0	290.0	219	67	74	23	64	4	0	5	1,147	5	7.79	1.99	3.92	0.71	21.9	5.6	0.98	.243	2.30	59	2.56	72	6.80	32.9
2	Don Sutton D. Sutton	2.42	1973	LAD	33	18	10	.643	33	200	14	3	0	256.1	196	69	78	18	56	5	0	4	1,006	10	7.02	1.97	3.57	0.63	19.9	5.6	0.98	.245	2.74	70	2.62	75	6.88	25.3
3	Wayne Twitchell W. Twitchell	2.50	1973	PHI	34	13	9	.591	28	169	10	5	0	223.1	172	62	71	16	99	10	0	9	921	13	6.81	3.99	1.71	0.64	18.3	10.7	1.21	.249	2.86	66	3.44	91	6.93	8.7
4	Mike Marshall M. Marshall	2.66	1973	MON	92	14	11	.560	0	124	0	0	31	179.0	163	53	62	10	75	4	73	12	746	8	6.23	3.77	1.65	0.50	16.6	10.1	1.33	.287	3.12	70	3.22	84	8.20	11.9
5	Andy Messersmith A. Messersmith	2.70	1973	LAD	33	14	10	.583	33	177	10	3	0	249.2	196	75	90	24	77	6	0	3	1,015	6	6.38	2.78	2.30	0.87	17.4	7.6	1.09	.235	3.24	78	3.39	97	7.07	2.4
6	Bob Gibson B. Gibson	2.77	1973	STL	25	12	10	.545	25	142	13	1	0	195.0	159	60	71	12	57	3	0	6	790	6	6.55	2.63	2.49	0.55	18.0	7.2	1.11	.255	3.28	76	2.82	77	7.34	18.5
7	Steve Renko S. Renko	2.81	1973	MON	36	15	11	.577	34	164	9	0	1	249.2	201	78	94	26	108	1	1	12	1,044	9	5.91	3.89	1.52	0.94	15.7	10.3	1.24	.235	3.39	74	3.91	102	7.25	-1.7
8	Nelson Briles N. Briles	2.84	1973	PIT	33	14	13	.519	33	94	7	1	0	218.2	201	69	87	19	51	1	0	3	893	1	3.87	2.10	1.84	0.78	10.5	5.7	1.15	.250	3.58	80	3.54	99	8.27	0.3
9	Jerry Koosman J. Koosman	2.84	1973	NYM	35	14	15	.483	35	156	12	3	0	263.0	234	83	93	18	76	4	0	6	1,071	3	5.34	2.60	2.05	0.62	14.6	7.1	1.18	.264	3.18	80	3.17	89	8.01	11.4
10	Dave Roberts D. Roberts	2.85	1973	HOU	39	17	11	.607	36	119	12	6	0	249.1	264	79	92	15	62	2	0	8	1,054	3	4.30	2.24	1.92	0.54	11.3	5.9	1.31	.291	3.32	80	3.16	88	9.53	11.3
11	Jim Rooker J. Rooker	2.85	1973	PIT	41	10	6	.625	18	122	6	3	5	170.1	143	54	59	12	52	2	9	10	694	4	6.45	2.75	2.35	0.63	17.6	7.5	1.14	.259	3.12	80	2.99	84	7.56	10.9
12	Rick Reuschel R. Reuschel	3.00	1973	CHC	36	14	15	.483	36	168	7	3	0	237.0	244	79	95	15	62	5	0	6	1,003	10	6.38	2.35	2.71	0.57	16.7	6.2	1.29	.304	3.61	77	2.81	71	9.27	28.5
13	Reggie Cleveland R. Cleveland	3.01	1973	STL	32	14	10	.583	32	122	6	3	0	224.0	211	75	88	13	61	4	0	12	939	3	4.90	2.45	2.00	0.52	13.0	6.5	1.21	.268	3.54	82	3.09	84	8.48	14.5
14	Jack Billingham J. Billingham	3.04	1973	CIN	40	19	10	.655	40	155	16	7	0	293.1	257	99	112	20	95	10	0	10	1,205	10	4.76	2.91	1.63	0.61	12.9	7.9	1.20	.256	3.44	86	3.46	98	7.89	1.7
15	Dock Ellis D. Ellis	3.05	1973	PIT	28	12	14	.462	28	122	3	1	0	192.0	176	65	86	7	55	6	0	7	803	3	5.72	2.58	2.22	0.33	15.2	6.8	1.20	.276	4.03	86	2.71	76	8.25	18.4
16	Tommy John T. John	3.10	1973	LAD	36	16	7	.696	31	116	4	2	0	218.0	202	75	88	16	50	4	3	2	888	3	4.79	2.06	2.32	0.66	13.1	5.6	1.16	.265	3.63	89	3.19	91	8.34	7.1
17	Alan Foster A. Foster	3.14	1973	STL	35	13	9	.591	29	106	6	2	0	203.2	195	71	82	17	63	5	3	3	854	1	4.68	2.78	1.68	0.75	12.4	7.4	1.27	.268	3.62	86	3.60	98	8.62	1.7
18	Don Wilson D. Wilson	3.20	1973	HOU	37	11	16	.407	32	149	10	3	2	239.1	187	85	94	21	92	7	4	6	988	7	5.60	3.46	1.62	0.79	15.1	9.3	1.17	.231	3.53	90	3.69	104	7.03	-3.9
19	Jon Matlack J. Matlack	3.20	1973	NYM	34	14	16	.467	34	205	14	3	0	242.0	210	86	93	16	99	2	0	14	1,011	6	7.62	3.68	2.07	0.60	20.3	9.8	1.28	.282	3.46	90	2.98	83	7.81	16
20	Bill Greif B. Greif	3.21	1973	SDP	36	10	17	.370	31	120	9	3	1	199.1	181	71	88	20	62	5	2	12	823	5	5.42	2.80	1.94	0.90	14.6	7.5	1.22	.261	3.97	91	3.67	104	8.17	-3.6
21	Ross Grimsley R. Grimsley	3.23	1973	CIN	38	13	10	.565	36	90	8	1	1	242.1	245	87	96	24	68	0	1	11	1,009	4	3.34	2.53	1.32	0.89	8.9	6.7	1.29	.267	3.57	92	3.94	112	9.10	-12.2
22	Phil Niekro P. Niekro	3.31	1973	ATL	42	13	10	.565	30	131	9	1	4	245.0	214	90	103	21	89	5	7	4	1,023	11	4.81	3.27	1.47	0.77	12.8	8.7	1.24	.248	3.78	85	3.75	96	7.86	4.5
23	Claude Osteen C. Osteen	3.31	1973	LAD	33	16	11	.593	33	86	12	3	0	236.2	227	87	97	20	61	2	0	2	961	7	3.27	2.32	1.41	0.76	8.9	6.3	1.22	.261	3.69	95	3.73	107	8.63	-7.2
24	Al Downing A. Downing	3.31	1973	LAD	30	9	9	.500	28	124	5	2	0	193.0	155	71	87	19	68	1	1	3	790	7	5.78	3.17	1.82	0.89	15.7	8.6	1.16	.235	4.06	95	3.63	104	7.23	-3.5
25	Rick Wise R. Wise	3.37	1973	STL	35	16	12	.571	34	144	14	5	0	259.0	259	97	113	18	59	3	1	12	1,083	5	5.00	2.05	2.44	0.63	13.3	5.4	1.23	.281	3.93	92	3.07	83	9.00	17.5