Jordan Lyles allowed the most runs in 2020, with 49 runs.

Interpreted as:

most runs allowed by a player 2020

	NAME	R	SEASON	TM	G	W	L	W%	GS	ERA	SO	CG	SHO	SV	IP	H	ER	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	Jordan Lyles J. Lyles	49	2020	TEX	12	1	6	.143	9	7.02	36	0	0	0	57.2	67	45	12	23	2	0	0	266	3	5.62	3.59	1.57	1.87	13.5	8.6	1.56	.285	7.65	156	5.94	130	10.46	-8.4
2	Matthew Boyd M. Boyd	46	2020	DET	12	3	7	.300	12	6.71	60	1	0	0	60.1	67	45	15	22	5	0	0	271	5	8.95	3.28	2.73	2.24	22.1	8.1	1.48	.308	6.86	153	5.77	131	9.99	-9.3
3	Kyle Gibson K. Gibson	44	2020	TEX	12	2	6	.250	12	5.35	58	1	1	0	67.1	73	40	12	30	6	0	1	301	1	7.75	4.01	1.93	1.60	19.3	10.0	1.53	.313	5.88	119	5.38	118	9.76	-5.8
4	Trevor Williams T. Williams	42	2020	PIT	11	2	8	.200	11	6.18	49	0	0	0	55.1	66	38	15	21	4	0	0	252	1	7.97	3.42	2.33	2.44	19.4	8.3	1.57	.313	6.83	138	6.29	140	10.73	-10.9
5	Johnny Cueto J. Cueto	41	2020	SFG	12	2	3	.400	12	5.40	56	0	0	0	63.1	61	38	9	26	3	0	0	277	1	7.96	3.69	2.15	1.28	20.2	9.4	1.37	.284	5.83	123	4.63	109	8.67	-2.8
6	Adrian Houser A. Houser	41	2020	MIL	12	1	6	.143	11	5.30	44	0	0	0	56.0	63	33	8	21	4	1	0	246	1	7.07	3.38	2.10	1.29	17.9	8.5	1.50	.325	6.59	119	4.81	108	10.13	-2.2
7	Germán Márquez G. Márquez	41	2020	COL	13	4	6	.400	13	3.75	73	0	0	0	81.2	78	34	6	25	0	0	0	344	4	8.04	2.76	2.92	0.66	21.2	7.3	1.26	.300	4.52	74	3.27	69	8.60	12.6
8	Rick Porcello R. Porcello	41	2020	NYM	12	1	7	.125	12	5.64	54	0	0	0	59.0	74	37	5	15	2	0	0	261	1	8.24	2.29	3.60	0.76	20.7	5.7	1.51	.373	6.25	136	3.32	77	11.29	6.6
9	Robbie Ray R. Ray	40	2020	TOT	12	2	5	.286	11	6.62	68	0	0	0	51.2	53	38	13	45	1	0	1	251	6	11.85	7.84	1.51	2.26	27.1	17.9	1.90	.323	6.97	146	6.49	149	9.23	-12.4
10	Anibal Sanchez A. Sanchez	40	2020	WSH	11	4	5	.444	11	6.62	43	0	0	0	53.0	70	39	11	18	3	0	2	245	0	7.30	3.06	2.39	1.87	17.6	7.3	1.66	.347	6.79	147	5.45	120	11.89	-5.2
11	Tanner Roark T. Roark	39	2020	TOR	11	2	3	.400	11	6.80	41	0	0	0	47.2	60	36	14	23	2	0	0	220	2	7.74	4.34	1.78	2.64	18.6	10.5	1.74	.329	7.36	148	6.85	156	11.33	-13.2
12	Luke Weaver L. Weaver	39	2020	ARI	12	1	9	.100	12	6.58	55	0	0	0	52.0	63	38	10	18	1	0	0	236	0	9.52	3.12	3.06	1.73	23.3	7.6	1.56	.349	6.75	146	4.66	107	10.90	-1.8
13	Aaron Civale A. Civale	39	2020	CLE	12	4	6	.400	12	4.74	69	1	0	0	74.0	82	39	11	16	3	0	0	312	0	8.39	1.95	4.31	1.34	22.1	5.1	1.32	.333	4.74	107	4.02	91	9.97	3.5
14	Logan Webb L. Webb	38	2020	SFG	13	3	4	.429	11	5.47	46	0	0	0	54.1	61	33	4	24	7	0	1	246	3	7.62	3.98	1.92	0.66	18.7	9.8	1.56	.345	6.29	125	4.16	97	10.10	0.6
15	Ross Stripling R. Stripling	37	2020	TOT	12	3	3	.500	9	5.84	40	0	0	1	49.1	56	32	13	18	1	1	0	220	1	7.30	3.28	2.22	2.37	18.2	8.2	1.50	.291	6.75	131	6.14	138	10.22	-9.4
16	Mike Minor M. Minor	36	2020	TOT	12	1	6	.143	11	5.56	62	1	1	0	56.2	50	35	11	20	1	0	0	239	0	9.85	3.18	3.10	1.75	25.9	8.4	1.24	.269	5.72	127	4.63	103	7.94	-0.9
17	Austin Voth A. Voth	36	2020	WSH	11	2	5	.286	11	6.34	44	1	0	0	49.2	57	35	14	18	4	0	2	225	1	7.97	3.26	2.44	2.54	19.6	8.0	1.51	.297	6.52	141	6.40	141	10.33	-10.1
18	Patrick Corbin P. Corbin	35	2020	WSH	11	2	7	.222	11	4.66	60	0	0	0	65.2	85	34	10	18	0	0	1	295	1	8.22	2.47	3.33	1.37	20.3	6.1	1.57	.362	4.80	103	4.16	92	11.65	2.8
19	Andrew Heaney A. Heaney	35	2020	LAA	12	4	3	.571	12	4.45	70	0	0	0	66.2	63	33	9	19	2	0	1	279	2	9.45	2.57	3.68	1.21	25.1	6.8	1.23	.302	4.72	99	3.78	83	8.51	5.8
20	Jon Lester J. Lester	35	2020	CHC	12	3	3	.500	12	5.16	42	0	0	0	61.0	64	35	11	17	3	0	0	265	2	6.20	2.51	2.47	1.62	15.8	6.4	1.33	.276	5.16	117	5.13	117	9.44	-5
21	Frankie Montas Jr. F. Montas Jr.	35	2020	OAK	11	3	5	.375	11	5.60	60	0	0	0	53.0	57	33	10	23	1	0	0	237	2	10.19	3.91	2.61	1.70	25.3	9.7	1.51	.329	5.94	133	4.73	110	9.68	-2.6
22	Julio Teheran J. Teheran	35	2020	LAA	10	0	4	.000	9	10.05	20	0	0	0	31.1	39	35	12	16	2	0	0	149	1	5.74	4.60	1.25	3.45	13.4	10.7	1.76	.273	10.05	223	8.61	188	11.20	-13.6
23	Kyle Freeland K. Freeland	34	2020	COL	13	2	3	.400	13	4.33	46	0	0	0	70.2	77	34	9	23	3	0	0	304	0	5.86	2.93	2.00	1.15	15.1	7.6	1.42	.305	4.33	85	4.64	98	9.81	0.7
24	Lance Lynn L. Lynn	34	2020	TEX	13	6	3	.667	13	3.32	89	1	0	0	84.0	64	31	13	25	6	0	0	344	2	9.54	2.68	3.56	1.39	25.9	7.3	1.06	.242	3.64	74	4.18	91	6.86	3.7
25	Tommy Milone T. Milone	34	2020	TOT	9	1	4	.200	9	6.69	40	0	0	0	39.0	55	29	9	6	2	0	0	181	1	9.23	1.38	6.67	2.08	22.1	3.3	1.56	.371	7.85	148	4.75	103	12.69	-0.6