red sox single season lowest era- since 1969

Since 1969, the Boston Red Sox have their best ERA- in a season in 2017, with an ERA- of 81.

	TEAM	ERA-	SEASON	G	GS	ERA	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	FIP	FIP-	H/9	PRAA
1	Red Sox	81	2017	677	162	3.73	1,580	5	1	39	1482.1	1,384	615	668	195	465	49	157	18	6,217	43	9.59	2.82	3.40	1.18	25.4	7.5	1.25	.303	4.06	3.77	87	8.40	94.7
2	Red Sox	81	1999	574	162	4.00	1,131	6	1	50	1436.2	1,396	638	718	160	469	55	156	25	6,120	28	7.09	2.94	2.41	1.00	18.5	7.7	1.30	.287	4.50	4.09	88	8.75	89.5
3	Red Sox	83	2002	500	162	3.75	1,157	5	3	51	1446.0	1,339	603	665	146	430	84	157	29	6,049	31	7.20	2.68	2.69	0.91	19.1	7.1	1.22	.282	4.14	3.73	88	8.33	80.4
4	Red Sox	83	2007	613	162	3.87	1,149	5	3	45	1438.2	1,350	618	657	151	482	62	157	20	6,071	33	7.19	3.02	2.38	0.94	18.9	7.9	1.27	.284	4.11	4.13	96	8.45	26.2
5	Red Sox	85	2018	697	162	3.75	1,558	2	0	46	1458.2	1,305	608	647	176	512	84	160	8	6,166	51	9.61	3.16	3.04	1.09	25.3	8.3	1.25	.294	3.99	3.81	91	8.05	60.5
6	Red Sox	85	1993	551	162	3.80	997	9	5	44	1452.1	1,379	614	698	127	552	48	153	87	6,201	42	6.18	3.42	1.81	0.79	16.1	8.9	1.33	.280	4.33	3.98	92	8.55	53.4
7	Red Sox	85	2000	587	162	4.24	1,121	7	4	46	1452.2	1,433	684	745	173	498	58	155	40	6,225	33	6.95	3.09	2.25	1.07	18.0	8.0	1.33	.288	4.62	4.28	92	8.88	56.2
8	Red Sox	86	2025	691	160	3.73	1,341	2	1	44	1430.1	1,318	593	671	163	523	73	158	17	6,078	53	8.44	3.29	2.56	1.03	22.1	8.6	1.29	.290	4.22	3.99	95	8.29	36.9
9	Red Sox	88	1992	490	162	3.63	943	22	6	39	1448.2	1,403	585	669	107	535	41	140	56	6,173	50	5.86	3.32	1.76	0.66	15.3	8.7	1.34	.285	4.16	3.63	91	8.72	56
10	Red Sox	88	1978	341	163	3.54	706	57	14	26	1472.2	1,530	579	657	137	464	35	106	45	6,274	16	4.31	2.84	1.52	0.84	11.3	7.4	1.35	.282	4.02	3.84	98	9.35	13.8
11	Red Sox	88	1998	594	162	4.19	1,025	5	2	53	1436.0	1,406	668	729	168	504	53	157	33	6,141	62	6.42	3.16	2.03	1.05	16.7	8.2	1.33	.282	4.57	4.39	98	8.81	12.6
12	Red Sox	89	2004	599	162	4.19	1,132	4	1	36	1451.1	1,430	676	768	159	447	92	158	28	6,222	39	7.02	2.77	2.53	0.99	18.2	7.2	1.29	.289	4.76	4.02	92	8.87	58.7
13	Red Sox	89	2008	628	162	4.01	1,185	5	2	47	1446.1	1,369	645	694	147	548	68	157	17	6,180	43	7.37	3.41	2.16	0.91	19.2	8.9	1.33	.289	4.32	4.08	98	8.52	15.3
14	Red Sox	89	1979	358	160	4.03	731	47	9	29	1431.1	1,487	641	711	133	463	37	113	45	6,120	31	4.60	2.91	1.58	0.84	11.9	7.6	1.36	.285	4.47	3.95	92	9.35	57.1
15	Red Sox	90	1973	306	162	3.66	808	67	9	33	1440.1	1,417	585	647	158	499	32	95	35	6,090	25	5.05	3.12	1.62	0.99	13.3	8.2	1.33	.274	4.04	3.97	99	8.85	13.5
16	Red Sox	91	2013	612	162	3.79	1,294	5	2	33	1454.0	1,366	613	656	156	524	47	157	10	6,143	47	8.01	3.24	2.47	0.97	21.1	8.5	1.30	.294	4.06	3.83	99	8.46	6.8
17	Red Sox	91	2016	625	162	4.00	1,362	9	1	43	1439.2	1,342	640	694	176	490	65	153	16	6,073	52	8.51	3.06	2.78	1.10	22.4	8.1	1.27	.293	4.34	3.99	95	8.39	32.7
18	Red Sox	91	1990	485	162	3.72	997	15	4	44	1442.0	1,439	596	664	92	519	45	147	47	6,174	63	6.22	3.24	1.92	0.57	16.1	8.4	1.36	.298	4.14	3.42	87	8.98	84.5
19	Red Sox	91	1995	514	144	4.41	888	7	2	39	1292.2	1,338	634	698	127	476	46	137	28	5,600	57	6.18	3.31	1.87	0.88	15.9	8.5	1.40	.298	4.86	4.21	91	9.32	60.1
20	Red Sox	91	1986	415	161	3.93	1,033	36	5	41	1429.2	1,469	625	696	167	474	26	125	35	6,102	55	6.50	2.98	2.18	1.05	16.9	7.8	1.36	.296	4.38	3.88	95	9.25	28.9
21	Red Sox	92	2001	585	161	4.18	1,259	3	2	48	1448.0	1,412	672	745	146	544	93	158	50	6,272	54	7.83	3.38	2.31	0.91	20.1	8.7	1.35	.299	4.63	3.93	92	8.78	57.4
22	Red Sox	92	1976	357	162	3.52	673	49	9	27	1458.0	1,495	571	660	109	409	32	113	45	6,153	33	4.15	2.52	1.65	0.67	10.9	6.6	1.31	.281	4.07	3.58	98	9.23	17
23	Red Sox	93	2009	625	162	4.35	1,230	8	2	41	1436.2	1,494	695	736	167	530	68	154	24	6,283	42	7.71	3.32	2.32	1.05	19.6	8.4	1.41	.309	4.61	4.13	96	9.36	28.9
24	Red Sox	93	2021	725	162	4.27	1,527	0	0	49	1419.0	1,409	674	749	176	546	79	162	31	6,147	63	9.68	3.46	2.80	1.12	24.8	8.9	1.38	.323	4.75	3.94	91	8.94	59.2
25	Red Sox	94	1991	490	162	4.02	999	15	4	45	1439.2	1,405	643	712	147	530	31	147	59	6,126	42	6.25	3.31	1.88	0.92	16.3	8.7	1.34	.285	4.45	3.96	98	8.78	13.4