Blake Snell allowed the most walks by a starting pitcher in 2023, with 99 allowed.

	NAME	BB	SEASON	TM	G	W	L	W%	GS	ERA	SO	CG	SHO	SV	IP	H	ER	R	HR	HBP	GF	IBB	TBF	WP	K/9	BB/9	K/BB	HR/9	K%	BB%	WHIP	BABIP	RA	H/9
1	Blake Snell B. Snell	99	2023	SDP	32	14	9	.609	32	2.25	234	0	0	0	180.0	115	45	47	15	3	0	0	742	13	11.70	4.95	2.36	0.75	31.5	13.3	1.19	.256	2.35	5.75
2	Michael Kopech M. Kopech	89	2023	CWS	27	5	12	.294	27	5.12	130	0	0	0	126.2	108	72	74	28	11	0	0	573	9	9.24	6.32	1.46	1.99	22.7	15.5	1.56	.254	5.26	7.67
3	Charlie Morton C. Morton	83	2023	ATL	30	14	12	.538	30	3.64	183	0	0	0	163.1	150	66	70	14	12	0	2	716	4	10.08	4.57	2.20	0.77	25.6	11.6	1.43	.321	3.86	8.27
4	Johan Oviedo J. Oviedo	83	2023	PIT	32	9	14	.391	32	4.31	158	1	1	0	177.2	161	85	91	19	13	0	1	781	7	8.00	4.20	1.90	0.96	20.2	10.6	1.37	.280	4.61	8.16
5	Josiah Gray J. Gray	80	2023	WSH	30	8	13	.381	30	3.91	143	0	0	0	159.0	152	69	72	22	9	0	1	698	9	8.09	4.53	1.79	1.25	20.5	11.5	1.46	.293	4.08	8.60
6	Dylan Cease D. Cease	79	2023	CWS	33	7	9	.438	33	4.58	214	0	0	0	177.0	172	90	98	19	9	0	3	784	13	10.88	4.02	2.71	0.97	27.3	10.1	1.42	.330	4.98	8.75
7	Kodai Senga K. Senga	77	2023	NYM	29	12	7	.632	29	2.98	202	0	0	0	166.1	126	55	60	17	5	0	0	694	14	10.93	4.17	2.62	0.92	29.1	11.1	1.22	.277	3.25	6.82
8	Patrick Sandoval P. Sandoval	74	2023	LAA	28	7	13	.350	28	4.35	128	0	0	0	144.2	146	70	89	12	4	0	2	652	5	7.96	4.60	1.73	0.75	19.6	11.3	1.52	.309	5.54	9.08
9	Lucas Giolito L. Giolito	73	2023	TOT	33	7	15	.318	33	4.88	204	0	0	0	184.1	169	100	110	41	9	0	2	794	5	9.96	3.56	2.79	2.00	25.7	9.2	1.31	.274	5.37	8.25
10	Taijuan Walker T. Walker	71	2023	PHI	31	15	6	.714	31	4.38	138	0	0	0	172.2	155	84	87	20	8	0	1	733	3	7.19	3.70	1.94	1.04	18.8	9.7	1.31	.272	4.53	8.08
11	Merrill Kelly M. Kelly	69	2023	ARI	30	12	8	.600	30	3.29	187	0	0	0	177.2	143	65	71	20	4	0	0	722	3	9.47	3.50	2.71	1.01	25.9	9.6	1.19	.278	3.60	7.24
12	Lance Lynn L. Lynn	67	2023	TOT	32	13	11	.542	32	5.73	191	0	0	0	183.2	189	117	127	44	9	0	1	808	3	9.36	3.28	2.85	2.16	23.6	8.3	1.39	.292	6.22	9.26
13	Jack Flaherty J. Flaherty	66	2023	TOT	27	8	9	.471	27	5.03	144	0	0	0	141.1	157	79	82	17	10	0	2	635	7	9.17	4.20	2.18	1.08	22.7	10.4	1.58	.352	5.22	10.00
14	Corbin Burnes C. Burnes	66	2023	MIL	32	10	8	.556	32	3.39	200	0	0	0	193.2	141	73	77	22	8	0	0	784	10	9.29	3.07	3.03	1.02	25.5	8.4	1.07	.244	3.58	6.55
15	Bryce Elder B. Elder	63	2023	ATL	31	12	4	.750	31	3.81	128	0	0	0	174.2	160	74	79	19	8	0	0	732	11	6.60	3.25	2.03	0.98	17.5	8.6	1.28	.274	4.07	8.24
16	Cristian Javier C. Javier	62	2023	HOU	31	10	4	.714	31	4.56	159	0	0	0	162.0	143	82	85	25	7	0	0	687	4	8.83	3.44	2.56	1.39	23.1	9.0	1.27	.272	4.72	7.94
17	Reid Detmers R. Detmers	60	2023	LAA	28	4	9	.308	28	4.48	168	0	0	0	148.2	141	74	81	19	13	0	2	644	7	10.17	3.63	2.80	1.15	26.1	9.3	1.35	.318	4.90	8.54
18	Tyler Anderson T. Anderson	59	2023	LAA	25	6	5	.545	25	5.52	109	0	0	0	132.0	139	81	83	18	7	0	1	590	5	7.43	4.02	1.85	1.23	18.5	10.0	1.50	.305	5.66	9.48
19	Chris Bassitt C. Bassitt	59	2023	TOR	33	16	8	.667	33	3.60	186	1	1	0	200.0	176	80	88	28	12	0	2	826	4	8.37	2.66	3.15	1.26	22.5	7.1	1.18	.274	3.96	7.92
20	Alek Manoah A. Manoah	59	2023	TOR	19	3	9	.250	19	5.87	79	0	0	0	87.1	93	57	61	15	9	0	1	415	3	8.14	6.08	1.34	1.55	19.0	14.2	1.74	.308	6.29	9.58
21	Spencer Strider S. Strider	58	2023	ATL	32	19	5	.792	32	3.86	281	0	0	0	186.2	146	80	85	22	9	0	1	763	6	13.55	2.80	4.84	1.06	36.8	7.6	1.09	.316	4.10	7.04
22	Tylor Megill T. Megill	58	2023	NYM	25	9	8	.529	25	4.70	105	0	0	0	126.1	141	66	76	18	6	0	0	567	8	7.48	4.13	1.81	1.28	18.5	10.2	1.58	.324	5.41	10.04
23	Edward Cabrera E. Cabrera	58	2023	MIA	20	6	6	.500	20	4.45	105	0	0	0	91.0	76	45	46	10	4	0	0	398	1	10.38	5.74	1.81	0.99	26.4	14.6	1.47	.299	4.55	7.52
24	MacKenzie Gore M. Gore	57	2023	WSH	27	7	10	.412	27	4.42	151	0	0	0	136.1	134	67	71	27	1	0	0	582	6	9.97	3.76	2.65	1.78	25.9	9.8	1.40	.309	4.69	8.85
25	Patrick Corbin P. Corbin	57	2023	WSH	32	10	15	.400	32	5.20	124	0	0	0	180.0	210	104	113	33	4	0	0	790	6	6.20	2.85	2.18	1.65	15.7	7.2	1.48	.309	5.65	10.50