The Cincinnati Reds had the worst ERA by a team in their last 10 games in 2023, with an ERA of 6.62.

	TEAM	ERA	SEASON	G	W%	W	L	SO	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	Reds	6.62	2023	10	.300	3	7	88	0	2	87.0	99	64	66	14	45	6	2	397	5	9.10	4.66	1.96	1.45	22.2	11.3	1.66	.348	6.83	10.24
2	Rockies	6.37	2023	10	.300	3	7	82	0	1	89.0	109	63	64	16	45	13	0	422	4	8.29	4.55	1.82	1.62	19.4	10.7	1.73	.350	6.47	11.02
3	Nationals	5.90	2023	10	.400	4	6	81	0	2	87.0	104	57	58	13	40	8	1	405	3	8.38	4.14	2.03	1.34	20.0	9.9	1.66	.346	6.00	10.76
4	Cardinals	5.22	2023	10	.400	4	6	70	0	2	88.0	105	51	59	15	31	2	3	388	6	7.16	3.17	2.26	1.53	18.0	8.0	1.55	.333	6.03	10.74
5	Braves	5.16	2023	10	.500	5	5	86	0	4	89.0	97	51	57	18	39	4	2	402	4	8.70	3.94	2.21	1.82	21.4	9.7	1.53	.310	5.76	9.81
6	Rays	5.10	2023	10	.500	5	5	100	0	1	90.0	100	51	63	13	33	8	2	414	5	10.00	3.30	3.03	1.30	24.2	8.0	1.48	.335	6.30	10.00
7	Pirates	4.99	2023	10	.500	5	5	88	0	4	88.1	84	49	50	13	39	5	1	386	6	8.97	3.97	2.26	1.32	22.8	10.1	1.39	.295	5.09	8.56
8	Rangers	4.99	2023	10	.600	6	4	71	0	2	92.0	96	51	51	10	39	4	3	404	2	6.95	3.82	1.82	0.98	17.6	9.7	1.47	.307	4.99	9.39
9	Dodgers	4.92	2023	10	.400	4	6	90	0	1	86.0	80	47	47	20	25	3	1	362	4	9.42	2.62	3.60	2.09	24.9	6.9	1.22	.268	4.92	8.37
10	Blue Jays	4.77	2023	10	.300	3	7	100	0	0	88.2	95	47	48	14	35	4	3	390	3	10.15	3.55	2.86	1.42	25.6	9.0	1.47	.342	4.87	9.64
11	Astros	4.60	2023	10	.500	5	5	94	0	2	90.0	77	46	48	18	34	6	0	379	1	9.40	3.40	2.76	1.80	24.8	9.0	1.23	.260	4.80	7.70
12	Guardians	4.55	2023	10	.400	4	6	84	0	3	87.0	91	44	55	9	48	2	1	398	6	8.69	4.97	1.75	0.93	21.1	12.1	1.60	.322	5.69	9.41
13	Royals	4.55	2023	10	.600	6	4	81	0	4	87.0	82	44	47	11	35	3	0	377	2	8.38	3.62	2.31	1.14	21.5	9.3	1.34	.287	4.86	8.48
14	Mariners	4.34	2023	10	.400	4	6	86	0	1	87.0	74	42	42	15	35	6	4	369	2	8.90	3.62	2.46	1.55	23.3	9.5	1.25	.260	4.34	7.66
15	Athletics	4.29	2023	10	.400	4	6	88	0	2	86.0	78	41	45	10	40	6	3	375	8	9.21	4.19	2.20	1.05	23.5	10.7	1.37	.294	4.71	8.16
16	White Sox	4.24	2023	10	.300	3	7	66	0	2	87.0	78	41	48	8	43	6	1	383	8	6.83	4.45	1.53	0.83	17.2	11.2	1.39	.269	4.97	8.07
17	Angels	4.21	2023	10	.400	4	6	78	0	1	87.2	78	41	46	15	47	7	0	387	8	8.01	4.83	1.66	1.54	20.2	12.1	1.43	.263	4.72	8.01
18	Red Sox	4.18	2023	10	.300	3	7	82	0	2	84.0	71	39	43	9	25	4	0	344	2	8.79	2.68	3.28	0.96	23.8	7.3	1.14	.277	4.61	7.61
19	Mets	4.08	2023	10	.400	4	6	98	0	1	86.0	80	39	44	11	32	7	3	374	1	10.26	3.35	3.06	1.15	26.2	8.6	1.30	.305	4.60	8.37
20	Brewers	3.94	2023	10	.400	4	6	96	0	2	89.0	83	39	41	14	40	1	1	380	6	9.71	4.04	2.40	1.42	25.3	10.5	1.38	.301	4.15	8.39
21	Cubs	3.92	2023	10	.400	4	6	92	0	3	87.1	79	38	46	11	44	2	0	381	7	9.48	4.53	2.09	1.13	24.1	11.5	1.41	.293	4.74	8.14
22	Yankees	3.83	2023	10	.600	6	4	77	1	4	87.0	81	37	40	10	24	5	0	364	5	7.97	2.48	3.21	1.03	21.2	6.6	1.21	.286	4.14	8.38
23	Marlins	3.71	2023	10	.500	5	5	106	0	4	85.0	82	35	39	8	27	5	2	366	4	11.22	2.86	3.93	0.85	29.0	7.4	1.28	.336	4.13	8.68
24	Twins	3.59	2023	10	.500	5	5	107	0	3	90.1	83	36	38	19	26	2	0	375	6	10.66	2.59	4.12	1.89	28.5	6.9	1.21	.290	3.79	8.27
25	Giants	3.32	2023	10	.300	3	7	80	0	2	89.1	77	33	40	10	19	6	1	363	3	8.06	1.91	4.21	1.01	22.0	5.2	1.07	.270	4.03	7.76