Tanner Houck and Germán Márquez are tied for allowing the most earned runs with 1.0+ inning pitched this season, with 39 earned runs.

Interpreted as:

most er by a pitcher in 1 or more inning this regular season

	NAME	ER	IP	SEASON	TM	G	W	L	W%	GS	ERA	SO	CG	SHO	SV	H	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	Tanner Houck T. Houck	39	43.2	2025	BOS	9	0	3	.000	9	8.04	32	0	0	0	57	41	10	17	5	0	0	203	2	6.60	3.50	1.88	2.06	15.8	8.4	1.69	.338	8.45	191	6.12	148	11.75	-9.5
2	Germán Márquez G. Márquez	39	40.0	2025	COL	9	1	6	.143	9	8.78	21	0	0	0	57	43	4	16	4	0	0	193	4	4.72	3.60	1.31	0.90	10.9	8.3	1.83	.358	9.67	187	4.85	114	12.83	-2.5
3	Sandy Alcantara S. Alcantara	37	41.2	2025	MIA	9	2	6	.250	9	7.99	34	0	0	0	44	37	7	23	1	0	0	191	4	7.34	4.97	1.48	1.51	17.8	12.0	1.61	.294	7.99	188	5.38	133	9.50	-6.2
4	Charlie Morton C. Morton	35	41.0	2025	BAL	12	0	7	.000	6	7.68	40	0	0	0	48	36	9	24	2	1	0	195	0	8.78	5.27	1.67	1.98	20.5	12.3	1.76	.325	7.90	197	5.90	147	10.54	-8.8
5	Eduardo Rodriguez E. Rodriguez	35	44.2	2025	AZ	9	1	3	.250	9	7.05	52	0	0	0	58	41	8	18	0	0	0	211	2	10.48	3.63	2.89	1.61	24.6	8.5	1.70	.376	8.26	168	4.31	110	11.69	-2
6	Aaron Nola A. Nola	34	49.2	2025	PHI	9	1	7	.125	9	6.16	52	0	0	0	59	35	11	16	3	0	0	220	1	9.42	2.90	3.25	1.99	23.6	7.3	1.51	.348	6.34	148	5.03	122	10.69	-4.8
7	Jordan Hicks J. Hicks	33	45.1	2025	SFG	9	1	5	.167	9	6.55	41	0	0	0	53	34	3	16	4	0	0	202	4	8.14	3.18	2.56	0.60	20.3	7.9	1.52	.362	6.75	162	3.47	89	10.52	2.1
8	Zac Gallen Z. Gallen	32	56.0	2025	AZ	10	3	5	.375	10	5.14	59	0	0	0	52	32	10	25	1	0	0	243	1	9.48	4.02	2.36	1.61	24.3	10.3	1.38	.284	5.14	122	4.70	120	8.36	-5.1
9	Kyle Freeland K. Freeland	31	45.1	2025	COL	9	0	6	.000	9	6.15	35	0	0	0	64	37	4	8	1	0	0	207	1	6.95	1.59	4.38	0.79	16.9	3.9	1.59	.377	7.35	131	3.29	78	12.71	4.7
10	Antonio Senzatela A. Senzatela	31	43.2	2025	COL	9	1	7	.125	9	6.39	22	0	0	0	74	37	9	13	1	0	0	210	1	4.53	2.68	1.69	1.85	10.5	6.2	1.99	.394	7.63	136	5.73	135	15.25	-6.8
11	Trevor Williams T. Williams	30	45.2	2025	WSH	9	2	5	.286	9	5.91	38	0	0	0	58	31	5	12	2	0	0	206	1	7.49	2.36	3.17	0.99	18.4	5.8	1.53	.356	6.11	144	3.78	92	11.43	1.6
12	Dean Kremer D. Kremer	30	50.1	2025	BAL	9	3	5	.375	9	5.36	34	0	0	0	53	32	10	13	1	0	0	216	4	6.08	2.32	2.62	1.79	15.7	6.0	1.31	.272	5.72	138	5.16	129	9.48	-6.6
13	Bowden Francis B. Francis	29	46.1	2025	TOR	9	2	6	.250	9	5.63	36	0	0	0	52	31	14	13	3	0	0	201	3	6.99	2.53	2.77	2.72	17.9	6.5	1.40	.281	6.02	143	6.51	159	10.10	-12.4
14	Cal Quantrill C. Quantrill	28	36.0	2025	MIA	8	2	4	.333	8	7.00	23	0	0	0	46	28	6	13	1	0	0	158	1	5.75	3.25	1.77	1.50	14.6	8.2	1.64	.348	7.00	165	5.15	127	11.50	-4.4
15	Luis Severino L. Severino	28	59.2	2025	ATH	10	1	4	.200	10	4.22	45	0	0	0	56	29	4	20	2	0	1	255	1	6.79	3.02	2.25	0.60	17.6	7.8	1.27	.283	4.37	106	3.57	87	8.45	3.5
16	Osvaldo Bido O. Bido	28	43.1	2025	ATH	9	2	4	.333	9	5.82	29	0	0	0	52	30	10	18	2	0	0	198	0	6.02	3.74	1.61	2.08	14.6	9.1	1.62	.302	6.23	146	6.14	150	10.80	-9.9
17	Taj Bradley T. Bradley	27	50.2	2025	TBR	9	3	3	.500	9	4.80	41	0	0	0	46	27	7	22	2	0	0	213	0	7.28	3.91	1.86	1.24	19.2	10.3	1.34	.277	4.80	126	4.69	118	8.17	-4.3
18	Kevin Gausman K. Gausman	26	51.0	2025	TOR	9	3	4	.429	9	4.59	46	0	0	0	42	27	7	12	0	0	1	201	0	8.12	2.12	3.83	1.24	22.9	6.0	1.06	.257	4.76	117	3.78	92	7.41	1.7
19	Zack Littell Z. Littell	26	54.1	2025	TBR	9	3	5	.375	9	4.31	32	0	0	0	51	26	13	10	0	0	1	216	0	5.30	1.66	3.20	2.15	14.8	4.6	1.12	.236	4.31	113	5.58	141	8.45	-10.1
20	Brady Singer B. Singer	26	46.2	2025	CIN	9	5	2	.714	9	5.01	43	0	0	0	43	29	7	18	1	0	0	198	0	8.29	3.47	2.39	1.35	21.7	9.1	1.31	.279	5.59	114	4.42	103	8.29	-0.6
21	Jake Irvin J. Irvin	26	60.1	2025	WSH	10	3	1	.750	10	3.88	40	0	0	0	53	26	10	17	1	0	0	249	1	5.97	2.54	2.35	1.49	16.1	6.8	1.16	.238	3.88	94	4.82	118	7.91	-4.8
22	Jack Kochanowicz J. Kochanowicz	26	49.2	2025	LAA	9	3	5	.375	9	4.71	29	0	0	0	51	27	7	22	3	0	2	211	1	5.26	3.99	1.32	1.27	13.7	10.4	1.47	.293	4.89	116	5.27	125	9.24	-5.6
23	Chase Dollander C. Dollander	26	34.0	2025	COL	7	2	4	.333	7	6.88	32	0	0	0	34	29	9	16	1	0	0	152	1	8.47	4.24	2.00	2.38	21.1	10.5	1.47	.266	7.68	146	6.16	145	9.00	-6.8
24	José Berríos J. Berríos	25	52.0	2025	TOR	9	1	1	.500	9	4.33	49	0	0	0	50	25	9	24	2	0	1	223	1	8.48	4.15	2.04	1.56	22.0	10.8	1.42	.295	4.33	110	4.96	121	8.65	-5
25	Sonny Gray S. Gray	25	50.0	2025	STL	9	4	1	.800	9	4.50	51	0	0	0	47	27	9	12	2	0	0	206	1	9.18	2.16	4.25	1.62	24.8	5.8	1.18	.288	4.86	110	4.24	107	8.46	-1.6