Craig Swan had the best ERA in the NL in 1978, with an ERA of 2.43.

Interpreted as:

Who had the best era with a minimum of 1 IP per team game in the nl in 1978?

	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	Craig Swan C. Swan	2.43	1978	NYM	29	9	6	.600	28	125	5	1	0	207.1	164	56	62	12	58	2	0	8	819	1	5.43	2.52	2.16	0.52	15.3	7.1	1.07	.244	2.69	71	2.99	85	7.12	11.7
2	Steve Rogers S. Rogers	2.47	1978	MON	30	13	10	.565	29	126	11	1	1	219.0	186	60	64	12	64	2	1	2	871	1	5.18	2.63	1.97	0.49	14.5	7.3	1.14	.261	2.63	70	3.04	88	7.64	10.2
3	Pete Vuckovich P. Vuckovich	2.54	1978	STL	45	12	12	.500	23	149	6	2	1	198.1	187	56	65	9	59	2	15	5	819	7	6.76	2.68	2.53	0.41	18.2	7.2	1.24	.297	2.95	70	2.58	75	8.49	18.8
4	Bob Knepper B. Knepper	2.63	1978	SFG	36	17	11	.607	35	147	16	6	0	260.0	218	76	85	10	85	4	1	11	1,062	6	5.09	2.94	1.73	0.35	13.8	8.0	1.17	.255	2.94	75	2.97	88	7.55	12.1
5	Burt Hooton B. Hooton	2.71	1978	LAD	32	19	10	.655	32	104	10	3	0	236.0	196	71	74	17	61	0	0	4	942	3	3.97	2.33	1.70	0.65	11.0	6.5	1.09	.236	2.82	77	3.40	95	7.47	4.3
6	Gaylord Perry G. Perry	2.73	1978	SDP	37	21	6	.778	37	154	5	2	0	260.2	241	79	96	9	66	2	0	8	1,055	4	5.32	2.28	2.33	0.31	14.6	6.3	1.18	.282	3.31	82	2.62	77	8.32	23.5
7	Vida Blue V. Blue	2.79	1978	SFG	35	18	10	.643	35	171	9	4	0	258.0	233	80	87	12	70	0	0	4	1,042	5	5.97	2.44	2.44	0.42	16.4	6.7	1.17	.280	3.03	80	2.67	79	8.13	21.1
8	Steve Carlton S. Carlton	2.84	1978	PHI	34	16	13	.552	34	161	12	3	0	247.1	228	78	91	30	63	3	0	7	1,006	3	5.86	2.29	2.56	1.09	16.0	6.3	1.18	.264	3.31	78	3.65	101	8.30	-1
9	Ed Halicki E. Halicki	2.85	1978	SFG	29	9	10	.474	28	105	9	4	1	199.0	166	63	74	11	45	7	1	9	819	1	4.75	2.04	2.33	0.50	12.8	5.5	1.06	.238	3.35	81	3.02	89	7.51	8.1
10	Tom Seaver T. Seaver	2.88	1978	CIN	36	16	14	.533	36	226	8	1	0	259.2	218	83	97	26	89	0	0	11	1,075	6	7.83	3.08	2.54	0.90	21.0	8.3	1.18	.262	3.36	80	3.16	89	7.56	11.7
11	Phil Niekro P. Niekro	2.88	1978	ATL	44	19	18	.514	42	248	22	4	1	334.1	295	107	129	16	102	13	1	5	1,389	11	6.68	2.75	2.43	0.43	17.9	7.3	1.19	.276	3.47	73	2.74	72	7.94	38.1
12	Randy Jones R. Jones	2.88	1978	SDP	37	13	14	.481	36	71	7	2	0	253.0	263	81	104	6	64	0	0	20	1,058	4	2.53	2.28	1.11	0.21	6.7	6.0	1.29	.280	3.70	87	3.08	90	9.36	9.6
13	John Denny J. Denny	2.96	1978	STL	33	14	11	.560	33	103	11	2	0	234.0	200	77	81	13	74	6	0	4	936	8	3.96	2.85	1.39	0.50	11.0	7.9	1.17	.253	3.12	82	3.44	100	7.69	-0.8
14	Bert Blyleven B. Blyleven	3.03	1978	PIT	34	14	10	.583	34	182	11	4	0	243.2	217	82	94	17	66	6	0	5	1,011	6	6.72	2.44	2.76	0.63	18.0	6.5	1.16	.270	3.47	83	2.87	80	8.02	19.6
15	Ross Grimsley R. Grimsley	3.05	1978	MON	36	20	11	.645	36	84	19	3	0	263.0	237	89	103	17	67	2	0	6	1,068	4	2.87	2.29	1.25	0.58	7.9	6.3	1.16	.245	3.52	87	3.56	103	8.11	-3.3
16	J.R. Richard	3.11	1978	HOU	36	18	11	.621	36	303	16	3	0	275.1	192	95	104	12	141	2	0	4	1,139	16	9.90	4.61	2.15	0.39	26.6	12.4	1.21	.264	3.40	94	2.50	74	6.28	26.9
17	Larry Christenson L. Christenson	3.24	1978	PHI	33	13	14	.481	33	131	9	3	0	228.0	209	82	90	16	47	1	0	7	925	6	5.17	1.86	2.79	0.63	14.2	5.1	1.12	.264	3.55	89	2.97	82	8.25	16
18	John Candelaria J. Candelaria	3.24	1978	PIT	30	12	11	.522	29	94	3	1	1	189.0	191	68	73	15	49	5	1	6	796	3	4.48	2.33	1.92	0.71	11.8	6.2	1.27	.278	3.48	89	3.47	96	9.10	3
19	Doug Rau D. Rau	3.26	1978	LAD	30	15	9	.625	30	95	7	2	0	199.0	219	72	82	17	68	2	0	5	859	0	4.30	3.08	1.40	0.77	11.1	7.9	1.44	.298	3.71	93	3.79	106	9.90	-4.7
20	Tommy John T. John	3.30	1978	LAD	33	17	10	.630	30	124	7	0	1	213.0	230	78	95	11	53	5	3	7	912	6	5.24	2.24	2.34	0.46	13.6	5.8	1.33	.305	4.01	94	2.90	81	9.72	15.8
21	Dennis Lamp D. Lamp	3.30	1978	CHC	37	7	15	.318	36	73	6	3	0	223.2	221	82	96	16	56	4	0	8	928	2	2.94	2.25	1.30	0.64	7.9	6.0	1.24	.263	3.86	84	3.66	98	8.89	2.7
22	Dick Ruthven D. Ruthven	3.38	1978	TOT	33	15	11	.577	33	120	11	3	0	231.2	214	87	95	21	56	1	0	3	937	6	4.66	2.18	2.14	0.82	12.8	6.0	1.17	.261	3.69	90	3.45	94	8.31	6.1
23	Rick Reuschel R. Reuschel	3.41	1978	CHC	35	14	15	.483	35	115	9	1	0	242.2	235	92	98	16	54	5	0	8	1,007	13	4.27	2.00	2.13	0.59	11.4	5.4	1.19	.268	3.63	87	3.21	86	8.72	14.2
24	Don Robinson D. Robinson	3.47	1978	PIT	35	14	6	.700	32	135	9	1	1	228.1	203	88	98	20	57	3	1	4	937	9	5.32	2.25	2.37	0.79	14.4	6.1	1.14	.253	3.86	95	3.32	92	8.00	7.3
25	Jim Barr J. Barr	3.53	1978	SFG	32	8	11	.421	25	44	5	2	1	163.0	180	64	69	7	35	0	2	6	690	0	2.43	1.93	1.26	0.39	6.4	5.1	1.32	.286	3.81	101	3.24	95	9.94	2.6