fewest walks per 9 innings with a minimum of 500 games since 1920

Since 1920, Dan Quisenberry has walked the lowest walks per nine innings when pitching in 500+ games, with 1.40 BB/9.

Interpreted as:

fewest walks per 9 innings by a player with a minimum of 500 games since 1920

	NAME	BB/9	G	W	L	W%	GS	ERA	SO	CG	SHO	SV	IP	H	ER	R	HR	BB	HBP	GF	IBB	TBF	WP	K/9	K/BB	HR/9	K%	BB%	WHIP	BABIP	RA	ERA-	FIP	FIP-	H/9	PRAA
1	Dan Quisenberry D. Quisenberry	1.40	674	56	46	.549	0	2.76	379	0	0	244	1043.1	1,064	320	356	59	162	7	553	70	4,247	4	3.27	2.34	0.51	8.9	3.8	1.18	.276	3.07	69	3.23	82	9.18	81.6
2	Robin Roberts R. Roberts	1.73	676	286	245	.539	609	3.41	2,357	305	45	25	4688.2	4,582	1,774	1,962	505	902	54	49	69	19,174	33	4.52	2.61	0.97	12.3	4.7	1.17	.265	3.77	89	3.50	91	8.80	179.6
3	Greg Maddux G. Maddux	1.80	744	355	227	.610	740	3.16	3,371	109	35	0	5008.1	4,726	1,756	1,981	353	999	137	3	177	20,421	70	6.06	3.37	0.63	16.5	4.9	1.14	.281	3.56	76	3.25	78	8.49	519.5
4	Carl Hubbell C. Hubbell	1.82	535	253	154	.622	433	2.98	1,677	260	36	33	3590.1	3,461	1,188	1,380	227	725	53	82		14,805	53	4.20	2.31	0.57	11.3	4.9	1.17	.267	3.46	76	3.55	89	8.68	174.2
5	Lew Burdette L. Burdette	1.84	626	203	144	.585	373	3.66	1,074	158	33	32	3067.1	3,186	1,246	1,400	289	628	56	128	63	12,745	23	3.15	1.71	0.85	8.4	4.9	1.24	.271	4.11	101	3.68	103	9.35	-41.7
6	Paul Derringer P. Derringer	1.88	579	223	212	.513	445	3.46	1,507	251	32	29	3645.0	3,912	1,401	1,652	158	761	32	98		15,391	50	3.72	1.98	0.39	9.8	4.9	1.28	.290	4.08	93	3.26	86	9.66	218.5
7	David Wells D. Wells	1.88	660	239	157	.604	489	4.13	2,201	54	12	13	3439.0	3,635	1,578	1,702	407	719	83	65	65	14,413	101	5.76	3.06	1.07	15.3	5.0	1.27	.293	4.45	93	3.99	90	9.51	172.9
8	Curt Schilling C. Schilling	1.96	569	216	146	.597	436	3.46	3,116	83	20	22	3261.0	2,998	1,253	1,318	347	711	52	81	43	13,284	72	8.60	4.38	0.96	23.5	5.4	1.14	.293	3.64	80	3.22	76	8.27	373.6
9	Doug Jones D. Jones	1.97	846	69	79	.466	4	3.30	909	0	0	303	1128.1	1,155	414	465	86	247	39	640	53	4,754	18	7.25	3.68	0.69	19.1	5.2	1.24	.308	3.71	78	3.10	74	9.21	138.6
10	Mike Mussina M. Mussina	1.98	537	270	153	.638	536	3.68	2,813	57	23	0	3562.2	3,460	1,458	1,559	376	785	60	0	29	14,593	71	7.11	3.58	0.95	19.3	5.4	1.19	.292	3.94	82	3.57	79	8.74	372.8
11	Fergie Jenkins F. Jenkins	1.99	664	284	226	.557	594	3.34	3,192	267	49	7	4500.2	4,142	1,669	1,853	484	997	84	37	116	18,400	62	6.38	3.20	0.97	17.3	5.4	1.14	.268	3.71	87	3.27	88	8.28	222.9
12	Mariano Rivera M. Rivera	2.01	1,115	82	60	.577	10	2.21	1,173	0	0	652	1283.2	998	315	340	71	286	46	952	41	5,103	13	8.22	4.10	0.50	23.0	5.6	1.00	.263	2.38	49	2.76	61	7.00	246.7
13	Mark Buehrle M. Buehrle	2.01	518	214	160	.572	493	3.81	1,870	33	10	0	3283.1	3,472	1,391	1,542	361	734	79	6	49	13,705	27	5.13	2.55	0.99	13.6	5.4	1.28	.292	4.23	87	4.11	93	9.52	111.9
14	Greg Swindell G. Swindell	2.02	664	123	122	.502	269	3.86	1,542	40	12	7	2233.1	2,313	957	1,053	262	501	21	93	34	9,301	30	6.21	3.08	1.06	16.6	5.4	1.26	.294	4.24	94	3.76	92	9.32	72.6
15	Dennis Eckersley D. Eckersley	2.02	1,071	197	171	.535	361	3.50	2,401	100	20	390	3285.2	3,076	1,278	1,382	347	738	75	577	91	13,534	28	6.58	3.25	0.95	17.7	5.5	1.16	.274	3.79	86	3.40	85	8.43	224.9
16	Zack Greinke Z. Greinke	2.02	586	225	156	.591	541	3.49	2,979	17	5	1	3389.1	3,207	1,315	1,410	367	762	79	8	25	13,877	101	7.91	3.91	0.97	21.5	5.5	1.17	.293	3.74	83	3.51	85	8.52	235
17	Syl Johnson S. Johnson	2.03	542	112	117	.489	209	4.06	920	82	11	43	2165.2	2,290	977	1,099	172	488	48	206		9,124	22	3.82	1.89	0.71	10.1	5.3	1.28	.283	4.57	96	4.00	93	9.52	79.1
18	Tommy Hunter T. Hunter	2.04	508	56	47	.544	76	4.07	639	2	0	22	917.1	930	415	442	129	208	30	112	13	3,830	16	6.27	3.07	1.27	16.7	5.4	1.24	.284	4.34	96	4.31	101	9.12	-4.2
19	Yusmeiro Petit Y. Petit	2.04	515	50	44	.532	59	3.93	767	2	1	8	904.0	833	395	414	137	205	5	104	25	3,699	17	7.64	3.74	1.36	20.7	5.5	1.15	.269	4.12	96	4.11	100	8.29	0.3
20	Dutch Leonard D. Leonard	2.06	640	191	181	.513	375	3.25	1,170	192	30	45	3218.1	3,304	1,162	1,432	158	737	56	171		13,487	97	3.27	1.59	0.44	8.7	5.5	1.26	.277	4.00	84	3.34	86	9.24	186.6
21	John Candelaria J. Candelaria	2.11	600	177	122	.592	356	3.33	1,673	54	13	29	2525.2	2,399	935	1,038	245	592	37	82	63	10,366	28	5.96	2.83	0.87	16.1	5.7	1.18	.275	3.70	88	3.40	90	8.55	106.1
22	Jim Kaat J. Kaat	2.15	898	283	237	.544	625	3.45	2,461	180	31	17	4530.1	4,620	1,738	2,038	395	1,083	122	102	116	19,023	128	4.89	2.27	0.78	12.9	5.7	1.26	.282	4.05	93	3.41	91	9.18	165.8
23	Rafael Betancourt R. Betancourt	2.15	680	38	37	.507	0	3.36	724	0	0	75	685.2	596	256	274	71	164	1	241	40	2,787	17	9.50	4.41	0.93	26.0	5.9	1.11	.287	3.60	76	3.04	71	7.82	92
24	Pedro Borbon P. Borbon	2.20	593	69	39	.639	4	3.52	409	0	0	80	1026.2	1,098	401	436	63	251	28	278	83	4,326	24	3.59	1.63	0.55	9.5	5.8	1.31	.290	3.82	98	3.41	95	9.63	18.5
25	Keith Foulke K. Foulke	2.22	619	41	37	.526	8	3.33	718	0	0	191	786.2	652	291	300	94	194	44	406	24	3,201	14	8.21	3.70	1.08	22.4	6.1	1.08	.259	3.43	74	3.71	82	7.46	72.4