Nolan Ryan had the lowest ERA in the NL in 1981, with an ERA of 1.69.

Interpreted as:

Who had the best era with a minimum of 1 IP per team game in the nl in 1981?

	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	Nolan Ryan N. Ryan	1.69	1981	HOU	21	11	5	.688	21	140	5	3	0	149.0	99	28	34	2	68	1	0	1	605	16	8.46	4.11	2.06	0.12	23.1	11.2	1.12	.246	2.05	52	2.28	70	5.98	16.5
2	Bob Knepper B. Knepper	2.18	1981	HOU	22	9	5	.643	22	75	6	5	0	156.2	128	38	41	5	38	4	0	1	617	0	4.31	2.18	1.97	0.29	12.2	6.2	1.06	.248	2.36	67	2.86	88	7.35	6.7
3	Burt Hooton B. Hooton	2.28	1981	LAD	23	11	6	.647	23	74	5	4	0	142.1	124	36	42	3	33	2	0	2	571	3	4.68	2.09	2.24	0.19	13.0	5.8	1.10	.264	2.66	67	2.57	76	7.84	13
4	Jerry Reuss J. Reuss	2.30	1981	LAD	22	10	4	.714	22	51	8	2	0	152.2	138	39	44	6	27	4	0	3	608	1	3.01	1.59	1.89	0.35	8.4	4.4	1.08	.254	2.59	68	3.05	90	8.14	5.7
5	Steve Carlton S. Carlton	2.42	1981	PHI	24	13	4	.765	24	179	10	1	0	190.0	152	51	59	9	62	1	0	3	763	9	8.48	2.94	2.89	0.43	23.5	8.1	1.13	.279	2.79	69	2.32	67	7.20	23.7
6	Vida Blue V. Blue	2.45	1981	SFG	18	8	6	.571	18	63	1	0	0	124.2	97	34	40	7	54	1	0	3	513	7	4.55	3.90	1.17	0.51	12.3	10.5	1.21	.232	2.89	73	3.64	110	7.00	-4.8
7	Fernando Valenzuela F. Valenzuela	2.48	1981	LAD	25	13	7	.650	25	180	11	8	0	192.1	140	53	55	11	61	1	0	4	758	4	8.42	2.85	2.95	0.51	23.7	8.0	1.05	.255	2.57	73	2.44	72	6.55	20.4
8	Tom Seaver T. Seaver	2.54	1981	CIN	23	14	2	.875	23	87	6	1	0	166.1	120	47	51	10	66	3	0	8	671	5	4.71	3.57	1.32	0.54	13.0	9.8	1.12	.218	2.76	72	3.58	104	6.49	-2.2
9	Don Sutton D. Sutton	2.61	1981	HOU	23	11	9	.550	23	104	6	3	0	158.2	132	46	51	6	29	1	0	3	624	0	5.90	1.64	3.59	0.34	16.7	4.6	1.01	.260	2.89	80	2.34	72	7.49	16.4
10	Bill Gullickson B. Gullickson	2.80	1981	MON	22	7	9	.438	22	115	3	2	0	157.1	142	49	54	3	34	4	0	4	640	4	6.58	1.94	3.38	0.17	18.0	5.3	1.12	.287	3.09	80	2.11	62	8.12	22.5
11	Rick Mahler R. Mahler	2.80	1981	ATL	34	8	6	.571	14	54	1	0	2	112.1	109	35	41	5	43	1	10	5	478	3	4.33	3.45	1.26	0.40	11.3	9.0	1.35	.277	3.28	77	3.39	94	8.73	3.1
12	Joe Niekro J. Niekro	2.82	1981	HOU	24	9	9	.500	24	77	5	2	0	166.0	150	52	60	8	47	0	0	4	676	7	4.17	2.55	1.64	0.43	11.4	7.0	1.19	.261	3.25	87	3.14	97	8.13	1.6
13	Doyle Alexander D. Alexander	2.89	1981	SFG	24	11	7	.611	24	77	1	1	0	152.1	156	49	51	11	44	2	0	2	646	4	4.55	2.60	1.75	0.65	11.9	6.8	1.31	.283	3.01	86	3.43	103	9.22	-2.2
14	Scott Sanderson S. Sanderson	2.95	1981	MON	22	9	7	.563	22	77	4	1	0	137.1	122	45	50	10	31	1	0	2	560	2	5.05	2.03	2.48	0.66	13.8	5.5	1.11	.254	3.28	84	3.12	92	8.00	4
15	Ray Burris R. Burris	3.05	1981	MON	22	9	7	.563	21	52	4	0	0	135.2	117	46	56	9	41	3	0	3	554	6	3.45	2.72	1.27	0.60	9.4	7.4	1.16	.241	3.71	87	3.67	108	7.76	-4.3
16	Phil Niekro P. Niekro	3.10	1981	ATL	22	7	7	.500	22	62	3	3	0	139.1	120	48	56	6	56	1	0	2	578	2	4.00	3.62	1.11	0.39	10.7	9.7	1.26	.252	3.62	85	3.49	96	7.75	2.3
17	Eddie Solomon E. Solomon	3.12	1981	PIT	22	8	6	.571	17	38	2	0	1	127.0	133	44	49	10	27	3	5	3	521	3	2.69	1.91	1.41	0.71	7.3	5.2	1.26	.278	3.47	86	3.73	108	9.43	-3.8
18	Bob Forsch B. Forsch	3.18	1981	STL	20	10	5	.667	20	41	1	0	0	124.1	106	44	47	7	29	4	0	3	501	3	2.97	2.10	1.41	0.51	8.2	5.8	1.09	.236	3.40	89	3.47	102	7.67	-1.2
19	Lary Sorensen L. Sorensen	3.27	1981	STL	23	7	7	.500	23	52	3	1	0	140.1	149	51	59	3	26	1	0	2	579	1	3.33	1.67	2.00	0.19	9.0	4.5	1.25	.294	3.78	92	2.71	80	9.56	10.5
20	Mario Soto M. Soto	3.29	1981	CIN	25	12	9	.571	25	151	10	3	0	175.0	142	64	69	13	61	3	0	3	717	4	7.77	3.14	2.48	0.67	21.1	8.5	1.16	.264	3.55	93	2.93	85	7.30	10.1
21	Steve Rogers S. Rogers	3.42	1981	MON	22	12	8	.600	22	87	7	3	0	160.2	149	61	64	7	41	2	0	4	652	1	4.87	2.30	2.12	0.39	13.3	6.3	1.18	.276	3.59	97	2.88	85	8.35	9
22	Bob Welch B. Welch	3.44	1981	LAD	23	9	5	.643	23	88	2	1	0	141.1	141	54	56	11	41	3	0	0	601	2	5.60	2.61	2.15	0.70	14.6	6.8	1.29	.284	3.57	102	3.30	97	8.98	1.3
23	Bruce Berenyi B. Berenyi	3.50	1981	CIN	21	9	6	.600	20	106	5	3	0	126.0	97	49	55	3	77	0	0	0	544	7	7.57	5.50	1.38	0.21	19.5	14.2	1.38	.263	3.93	99	3.06	89	6.93	5.5
24	Juan Eichelberger J. Eichelberger	3.50	1981	SDP	25	8	8	.500	24	81	3	1	0	141.1	136	55	60	5	74	3	1	5	615	5	5.16	4.71	1.09	0.32	13.2	12.0	1.49	.290	3.82	105	3.54	106	8.66	-3.3
25	Randy Martz R. Martz	3.68	1981	CHC	33	5	7	.417	14	32	1	0	6	107.2	103	44	49	6	49	1	10	1	464	3	2.67	4.10	0.65	0.50	6.9	10.6	1.41	.258	4.10	99	4.12	117	8.61	-6.8