Nolan Ryan has allowed the most career walks, with 2,795 allowed.

Interpreted as:

most career walks with a minimum of 1500 IP for a pitcher

	NAME	BB	IP	G	W	L	W%	GS	ERA	SO	CG	SHO	SV	H	ER	R	HR	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	Nolan Ryan N. Ryan	2,795	5386.0	807	324	292	.526	773	3.19	5,714	222	61	3	3,923	1,911	2,178	321	158	13	78	22,575	277	9.55	4.67	2.04	0.54	25.3	12.4	1.25	.265	3.64	90	2.96	83	6.56	370.2
2	Steve Carlton S. Carlton	1,833	5217.2	741	329	244	.574	709	3.22	4,136	254	55	2	4,672	1,864	2,130	414	53	13	150	21,683	183	7.13	3.16	2.26	0.71	19.1	8.5	1.25	.279	3.67	87	3.14	86	8.06	271.5
3	Phil Niekro P. Niekro	1,809	5404.0	864	318	274	.537	716	3.35	3,342	245	45	29	5,044	2,012	2,337	482	123	83	86	22,677	226	5.57	3.01	1.85	0.80	14.7	8.0	1.27	.270	3.89	87	3.61	95	8.40	116.1
4	Early Wynn E. Wynn	1,775	4564.0	691	300	244	.551	611	3.54	2,334	289	49	16	4,291	1,796	2,037	338	64	67	36	19,408	51	4.60	3.50	1.31	0.67	12.0	9.1	1.33	.265	4.02	94	3.64	97	8.46	56.4
5	Bob Feller B. Feller	1,764	3827.0	570	266	162	.621	484	3.25	2,581	279	44	22	3,271	1,384	1,557	224	60	52	6	16,180	69	6.07	4.15	1.46	0.53	16.0	10.9	1.32	.264	3.66	82	3.48	89	7.69	184.6
6	Bobo Newsom B. Newsom	1,732	3759.1	600	211	222	.487	483	3.98	2,082	246	31	21	3,769	1,664	1,908	206	61	71		16,467	60	4.98	4.15	1.20	0.49	12.6	10.5	1.46	.288	4.57	95	3.81	92	9.02	144.5
7	Amos Rusie A. Rusie	1,707	3778.2	463	246	174	.586	427	3.07	1,950	393	30	5	3,389	1,288	2,068	75	112	35		16,313	153	4.64	4.07	1.14	0.18	12.0	10.5	1.35	.266	4.93	78	3.71	92	8.07	124.3
8	Charlie Hough C. Hough	1,665	3801.1	858	216	216	.500	440	3.75	2,362	107	13	61	3,283	1,582	1,807	383	174	240	44	16,170	179	5.59	3.94	1.42	0.91	14.6	10.3	1.30	.250	4.28	95	4.28	109	7.77	-142.3
9	Roger Clemens R. Clemens	1,580	4916.2	709	354	184	.658	707	3.12	4,672	118	46	0	4,185	1,707	1,885	363	159	0	63	20,240	143	8.55	2.89	2.96	0.66	23.1	7.8	1.17	.284	3.45	70	3.08	71	7.66	680.4
10	Gus Weyhing G. Weyhing	1,570	4337.0	540	264	232	.532	505	3.88	1,667	449	28	4	4,576	1,872	2,796	120	277	34		19,188	240	3.46	3.26	1.06	0.25	8.7	8.2	1.42	.286	5.80	96	3.82	97	9.50	55.7
11	Red Ruffing R. Ruffing	1,541	4344.0	624	273	225	.548	538	3.80	1,987	335	45	18	4,284	1,833	2,115	254	58	69		18,546	46	4.12	3.19	1.29	0.53	10.7	8.3	1.34	.274	4.38	91	3.93	95	8.88	82.3
12	Tom Glavine T. Glavine	1,500	4413.1	682	305	203	.600	682	3.54	2,607	56	25	0	4,298	1,734	1,900	356	66	0	145	18,604	65	5.32	3.06	1.74	0.73	14.0	8.1	1.31	.280	3.87	86	3.94	94	8.76	120.1
13	Randy Johnson R. Johnson	1,497	4135.1	618	303	166	.646	603	3.29	4,875	100	37	2	3,346	1,513	1,703	411	190	7	37	17,067	109	10.61	3.26	3.26	0.89	28.6	8.8	1.17	.291	3.71	75	3.18	73	7.28	554.3
14	Bump Hadley B. Hadley	1,442	2945.2	528	161	165	.494	355	4.24	1,318	134	14	25	2,980	1,389	1,609	167	63	108		13,016	72	4.03	4.41	0.91	0.51	10.1	11.1	1.50	.281	4.92	96	4.42	102	9.10	-27.9
15	Warren Spahn W. Spahn	1,434	5243.2	750	363	245	.597	665	3.09	2,583	382	63	28	4,830	1,798	2,016	434	42	67	60	21,547	81	4.43	2.46	1.80	0.74	12.0	6.7	1.19	.258	3.46	84	3.44	94	8.29	124.4
16	Earl Whitehill E. Whitehill	1,431	3564.2	541	218	185	.541	473	4.36	1,350	226	16	11	3,917	1,726	2,018	192	101	46		15,781	43	3.41	3.61	0.94	0.48	8.6	9.1	1.50	.293	5.10	99	4.29	99	9.89	6
17	Tony Mullane T. Mullane	1,408	4531.1	555	284	220	.563	504	3.05	1,803	468	30	15	4,195	1,537	2,523	97	135	52		19,407	343	3.58	2.80	1.28	0.19	9.3	7.3	1.24	.258	5.01	85	3.54	99	8.33	25.1
18	Sad Sam Jones S. Sam Jones	1,396	3883.0	647	229	217	.513	487	3.84	1,223	250	36	31	4,084	1,656	2,008	151	69	116		16,662	73	2.83	3.24	0.88	0.35	7.3	8.4	1.41	.285	4.65	98	3.93	101	9.47	-7.5
19	Jack Morris J. Morris	1,390	3824.0	549	254	186	.577	527	3.90	2,478	175	28	0	3,567	1,657	1,815	389	58	10	99	16,120	206	5.83	3.27	1.78	0.92	15.4	8.6	1.30	.269	4.27	96	3.93	95	8.40	93
20	Tom Seaver T. Seaver	1,390	4783.0	656	311	205	.603	647	2.86	3,640	231	61	1	3,971	1,521	1,674	380	76	6	116	19,369	126	6.85	2.62	2.62	0.72	18.8	7.2	1.12	.259	3.15	79	3.03	85	7.47	286.1
21	Gaylord Perry G. Perry	1,379	5350.0	777	314	265	.542	690	3.11	3,534	303	53	10	4,938	1,846	2,128	399	108	33	164	21,953	160	5.95	2.32	2.56	0.67	16.1	6.3	1.18	.275	3.58	85	3.06	85	8.31	312.9
22	Bobby Witt B. Witt	1,375	2465.0	430	142	157	.475	397	4.83	1,955	47	11	0	2,493	1,324	1,449	252	39	13	37	11,003	128	7.14	5.02	1.42	0.92	17.8	12.5	1.57	.304	5.29	111	4.41	102	9.10	-26.2
23	Mike Torrez M. Torrez	1,371	3043.2	494	185	160	.536	458	3.96	1,404	117	15	0	3,043	1,340	1,501	223	59	13	84	13,179	103	4.15	4.05	1.02	0.66	10.7	10.4	1.45	.279	4.44	102	4.06	107	9.00	-86.3
24	Walter Johnson W. Johnson	1,363	5914.1	802	417	279	.599	666	2.17	3,509	531	110	34	4,913	1,424	1,902	97	205	127		23,405	154	5.34	2.07	2.57	0.15	15.0	5.8	1.06	.264	2.89	68	2.42	76	7.48	472.8
25	Don Sutton D. Sutton	1,343	5282.1	774	324	256	.559	756	3.26	3,574	178	58	5	4,692	1,914	2,104	472	82	12	102	21,631	112	6.09	2.29	2.66	0.80	16.5	6.2	1.14	.261	3.58	92	3.23	90	7.99	181.2