Patrick Corbin allowed the most runs in 2021, with 114 runs.

Interpreted as:

most run allowed by a player 2021

	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	Patrick Corbin P. Corbin	114	2021	WSH	31	9	16	.360	31	5.82	143	0	0	0	171.2	192	111	37	60	3	0	2	751	0	7.50	3.15	2.38	1.94	19.0	8.0	1.47	.305	5.98	139	5.40	126	10.07	-21
2	Dallas Keuchel D. Keuchel	105	2021	CWS	32	9	9	.500	30	5.28	95	0	0	0	162.0	189	95	25	59	7	0	1	720	5	5.28	3.28	1.61	1.39	13.2	8.2	1.53	.307	5.83	121	5.22	117	10.50	-13.1
3	Jordan Lyles J. Lyles	104	2021	TEX	32	10	13	.435	30	5.15	146	0	0	0	180.0	194	103	38	56	7	1	0	769	9	7.30	2.80	2.61	1.90	19.0	7.3	1.39	.299	5.20	117	5.33	121	9.70	-17.8
4	Kyle Hendricks K. Hendricks	101	2021	CHC	32	14	7	.667	32	4.77	131	1	0	0	181.0	200	96	31	44	13	0	3	785	2	6.51	2.19	2.98	1.54	16.7	5.6	1.35	.299	5.02	115	4.89	116	9.94	-14.1
5	J.A. Happ	100	2021	TOT	30	10	8	.556	30	5.79	122	0	0	0	152.1	177	98	30	48	3	0	0	671	4	7.21	2.84	2.54	1.77	18.2	7.2	1.48	.314	5.91	137	5.13	122	10.46	-15.8
6	Zach Davies Z. Davies	99	2021	CHC	32	6	12	.333	32	5.78	114	0	0	0	148.0	162	95	25	75	5	0	2	668	0	6.93	4.56	1.52	1.52	17.1	11.2	1.60	.305	6.02	139	5.44	130	9.85	-20.7
7	Matt Harvey M. Harvey	96	2021	BAL	28	6	14	.300	28	6.27	95	0	0	0	127.2	160	89	19	37	5	0	1	582	3	6.70	2.61	2.57	1.34	16.3	6.4	1.54	.331	6.77	142	4.60	101	11.28	-0.5
8	Ryan Yarbrough R. Yarbrough	96	2021	TBR	30	9	7	.563	21	5.11	117	1	0	0	155.0	163	88	25	27	9	0	2	653	1	6.79	1.57	4.33	1.45	17.9	4.1	1.23	.291	5.57	125	4.45	108	9.46	-6.4
9	Aaron Nola A. Nola	95	2021	PHI	32	9	9	.500	32	4.63	223	1	1	0	180.2	165	93	26	39	9	0	1	749	0	11.11	1.94	5.72	1.30	29.8	5.2	1.13	.308	4.73	110	3.36	78	8.22	19.1
10	Luis Castillo L. Castillo	94	2021	CIN	33	8	16	.333	33	3.98	192	0	0	0	187.2	181	83	19	75	7	0	4	803	1	9.21	3.60	2.56	0.91	23.9	9.3	1.36	.318	4.51	90	3.74	84	8.68	14.5
11	Cole Irvin C. Irvin	94	2021	OAK	32	10	15	.400	32	4.24	125	0	0	0	178.1	195	84	23	42	9	0	0	768	3	6.31	2.12	2.98	1.16	16.3	5.5	1.33	.302	4.74	103	4.29	104	9.84	-3.2
12	Germán Márquez G. Márquez	92	2021	COL	32	12	11	.522	32	4.40	176	3	1	0	180.0	165	88	21	64	4	0	5	756	15	8.80	3.20	2.75	1.05	23.3	8.5	1.27	.293	4.60	91	3.86	87	8.25	11.7
13	Mike Minor M. Minor	92	2021	KCR	28	8	12	.400	28	5.05	149	0	0	0	158.2	156	89	26	41	5	0	0	669	4	8.45	2.33	3.63	1.47	22.3	6.1	1.24	.290	5.22	112	4.28	101	8.85	-1
14	Jake Arrieta J. Arrieta	91	2021	TOT	24	5	14	.263	24	7.39	83	0	0	0	98.2	131	81	24	44	6	0	3	469	3	7.57	4.01	1.89	2.19	17.7	9.4	1.77	.343	8.30	180	6.16	147	11.95	-21.8
15	Erick Fedde E. Fedde	90	2021	WSH	29	7	9	.438	27	5.47	128	0	0	0	133.1	144	81	23	48	4	1	6	590	1	8.64	3.24	2.67	1.55	21.7	8.1	1.44	.313	6.07	130	4.65	109	9.72	-5.4
16	Brad Keller B. Keller	89	2021	KCR	26	8	12	.400	26	5.39	120	0	0	0	133.2	158	80	18	64	7	0	1	613	5	8.08	4.31	1.88	1.21	19.6	10.4	1.66	.347	5.99	120	4.71	111	10.64	-7.2
17	Tyler Anderson T. Anderson	87	2021	TOT	31	7	11	.389	31	4.53	134	0	0	0	167.0	170	84	27	38	1	0	2	703	1	7.22	2.05	3.53	1.46	19.1	5.4	1.25	.284	4.69	108	4.36	104	9.16	-3
18	Eduardo Rodriguez E. Rodriguez	87	2021	BOS	32	13	8	.619	31	4.74	185	0	0	0	157.2	172	83	19	47	2	0	0	675	0	10.56	2.68	3.94	1.08	27.4	7.0	1.39	.363	4.97	103	3.31	77	9.82	17.5
19	Mike Foltynewicz M. Foltynewicz	86	2021	TEX	28	2	12	.143	24	5.44	97	0	0	0	139.0	139	84	35	36	9	0	0	586	2	6.28	2.33	2.69	2.27	16.6	6.1	1.26	.254	5.57	123	6.01	136	9.00	-23.9
20	Garrett Richards G. Richards	86	2021	BOS	40	7	8	.467	22	4.87	115	0	0	3	136.2	158	74	19	60	5	4	1	617	7	7.57	3.95	1.92	1.25	18.6	9.7	1.60	.333	5.66	106	4.71	109	10.40	-5.9
21	Sandy Alcantara S. Alcantara	85	2021	MIA	33	9	15	.375	33	3.19	201	1	0	0	205.2	171	73	21	50	10	0	2	837	6	8.80	2.19	4.02	0.92	24.0	6.0	1.07	.270	3.72	76	3.41	82	7.48	17.2
22	Andrew Heaney A. Heaney	85	2021	TOT	30	8	9	.471	23	5.83	150	0	0	0	129.2	130	84	29	41	6	2	0	558	4	10.41	2.85	3.66	2.01	26.9	7.3	1.32	.304	5.90	134	4.84	111	9.02	-7
23	Hyun Jin Ryu H. Jin Ryu	85	2021	TOR	31	14	10	.583	31	4.37	143	1	1	0	169.0	170	82	24	37	2	0	0	701	2	7.62	1.97	3.86	1.28	20.4	5.3	1.22	.295	4.53	97	4.01	95	9.05	4.2
24	Jon Lester J. Lester	84	2021	TOT	28	7	6	.538	28	4.71	91	0	0	0	141.1	159	74	25	55	3	0	5	627	0	5.79	3.50	1.65	1.59	14.5	8.8	1.51	.296	5.35	114	5.41	128	10.13	-18.7
25	Antonio Senzatela A. Senzatela	84	2021	COL	28	4	10	.286	28	4.42	105	0	0	0	156.2	178	77	12	32	9	0	1	670	4	6.03	1.84	3.28	0.69	15.7	4.8	1.34	.324	4.83	92	3.60	81	10.23	14.4