The Washington Nationals had the best ERA by a team in 2014, with an ERA of 3.03.

	TEAM	ERA	SEASON	G	W%	W	L	GS	SO	CG	SHO	SV	IP	H	ER	R	HR	BB	HBP	IBB	TBF	WP	K/9	BB/9	K/BB	HR/9	K%	BB%	WHIP	BABIP	RA	H/9
1	Nationals	3.03	2014	162	.593	96	66	162	1,288	5	4	45	1470.2	1,351	495	555	110	352	51	26	6,020	37	7.88	2.15	3.66	0.67	21.4	5.8	1.16	.294	3.40	8.27
2	Mariners	3.17	2014	162	.537	87	75	162	1,317	2	1	51	1452.0	1,240	512	554	137	463	52	36	5,974	80	8.16	2.87	2.84	0.85	22.0	7.8	1.17	.275	3.43	7.69
3	Athletics	3.22	2014	162	.543	88	74	162	1,244	7	3	31	1463.1	1,269	524	572	147	406	48	28	5,972	59	7.65	2.50	3.06	0.90	20.8	6.8	1.14	.272	3.52	7.80
4	Padres	3.27	2014	162	.475	77	85	162	1,284	4	3	41	1438.2	1,300	523	577	117	462	46	32	6,006	57	8.03	2.89	2.78	0.73	21.4	7.7	1.22	.289	3.61	8.13
5	Braves	3.38	2014	162	.488	79	83	162	1,301	5	2	54	1455.0	1,369	547	597	121	472	37	36	6,087	75	8.05	2.92	2.76	0.75	21.4	7.8	1.27	.300	3.69	8.47
6	Dodgers	3.40	2014	162	.580	94	68	162	1,373	7	3	47	1464.2	1,338	554	617	142	429	41	35	6,075	64	8.44	2.64	3.20	0.87	22.6	7.1	1.21	.292	3.79	8.22
7	Orioles	3.43	2014	162	.593	96	66	162	1,174	3	2	53	1461.1	1,342	557	593	151	472	59	25	6,104	42	7.23	2.91	2.49	0.93	19.2	7.7	1.24	.280	3.65	8.27
8	Pirates	3.47	2014	162	.543	88	74	162	1,228	2	1	48	1456.1	1,341	562	631	128	499	88	43	6,130	71	7.59	3.08	2.46	0.79	20.0	8.1	1.26	.290	3.90	8.29
9	Mets	3.49	2014	162	.488	79	83	162	1,303	1	1	42	1463.2	1,370	568	618	141	509	50	38	6,170	56	8.01	3.13	2.56	0.87	21.1	8.2	1.28	.295	3.80	8.42
10	Giants	3.50	2014	162	.543	88	74	162	1,211	8	3	46	1449.0	1,305	564	614	133	389	57	35	5,947	49	7.52	2.42	3.11	0.83	20.4	6.5	1.17	.282	3.81	8.11
11	Cardinals	3.50	2014	162	.556	90	72	162	1,221	8	5	55	1448.2	1,321	564	603	123	470	61	35	6,069	44	7.59	2.92	2.60	0.76	20.1	7.7	1.24	.286	3.75	8.21
12	Royals	3.51	2014	162	.549	89	73	162	1,168	3	2	53	1450.2	1,386	565	624	128	440	56	14	6,101	58	7.25	2.73	2.65	0.79	19.1	7.2	1.26	.292	3.87	8.60
13	Rays	3.56	2014	162	.475	77	85	162	1,437	3	1	37	1463.2	1,292	579	625	145	482	58	27	6,131	65	8.84	2.96	2.98	0.89	23.4	7.9	1.21	.286	3.84	7.94
14	Indians	3.56	2014	162	.525	85	77	162	1,450	6	4	40	1468.1	1,398	581	653	135	464	58	51	6,193	56	8.89	2.84	3.13	0.83	23.4	7.5	1.27	.309	4.00	8.57
15	Angels	3.58	2014	162	.605	98	64	162	1,342	3	2	46	1482.2	1,307	590	630	126	504	63	41	6,179	74	8.15	3.06	2.66	0.76	21.7	8.2	1.22	.285	3.82	7.93
16	Reds	3.59	2014	162	.469	76	86	162	1,290	5	3	44	1446.0	1,282	576	612	163	507	69	33	6,067	45	8.03	3.16	2.54	1.01	21.3	8.4	1.24	.277	3.81	7.98
17	Brewers	3.67	2014	162	.506	82	80	162	1,246	3	3	45	1457.2	1,386	594	657	167	431	42	20	6,106	44	7.69	2.66	2.89	1.03	20.4	7.1	1.25	.289	4.06	8.56
18	Yankees	3.75	2014	162	.519	84	78	162	1,370	5	2	48	1453.0	1,392	605	664	164	398	65	23	6,114	49	8.49	2.47	3.44	1.02	22.4	6.5	1.23	.298	4.11	8.62
19	Marlins	3.78	2014	162	.475	77	85	162	1,190	3	3	42	1457.2	1,481	613	674	114	458	49	35	6,217	56	7.35	2.83	2.60	0.70	19.1	7.4	1.33	.310	4.16	9.14
20	Phillies	3.79	2014	162	.451	73	89	162	1,255	2	0	40	1468.1	1,396	619	687	134	521	69	43	6,261	49	7.69	3.19	2.41	0.82	20.0	8.3	1.31	.295	4.21	8.56
21	Cubs	3.91	2014	162	.451	73	89	162	1,311	1	1	37	1463.1	1,398	636	707	115	504	55	37	6,208	64	8.06	3.10	2.60	0.71	21.1	8.1	1.30	.304	4.35	8.60
22	Blue Jays	4.00	2014	162	.512	83	79	162	1,199	3	2	45	1443.0	1,400	642	686	151	490	57	23	6,150	43	7.48	3.06	2.45	0.94	19.5	8.0	1.31	.294	4.28	8.73
23	Red Sox	4.01	2014	162	.438	71	91	162	1,213	3	2	36	1465.2	1,458	653	715	154	482	47	19	6,231	51	7.45	2.96	2.52	0.95	19.5	7.7	1.32	.301	4.39	8.95
24	Tigers	4.01	2014	162	.556	90	72	162	1,244	5	4	41	1454.0	1,475	648	705	127	462	42	34	6,191	43	7.70	2.86	2.69	0.79	20.1	7.5	1.33	.312	4.36	9.13
25	Astros	4.11	2014	162	.432	70	92	162	1,137	7	2	31	1438.2	1,437	657	723	139	484	52	32	6,154	57	7.11	3.03	2.35	0.87	18.5	7.9	1.34	.299	4.52	8.99