highest career winning percentage with at least 400 starts

Clayton Kershaw has the best career win percentage when starting 400+ games, at .693.

Interpreted as:

highest career winning percentage by a player with at least 400 starts

	NAME	W%	GS	W	L	G	ERA	SO	CG	SHO	SV	IP	H	ER	R	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	Clayton Kershaw C. Kershaw	.693	429	212	94	432	2.50	2,968	25	15	0	2742.2	2,091	762	835	227	678	44	1	28	10,816	103	9.74	2.22	4.38	0.74	27.4	6.3	1.01	.270	2.74	64	2.82	70	6.86	366.8
2	Whitey Ford W. Ford	.690	438	236	106	498	2.75	1,956	156	45	11	3170.1	2,766	967	1,107	228	1,086	28	35	44	13,036	75	5.55	3.08	1.80	0.65	15.0	8.3	1.22	.261	3.14	75	3.26	88	7.85	156.9
3	Pedro Martinez P. Martinez	.687	409	219	100	476	2.93	3,154	46	17	3	2827.1	2,221	919	1,006	239	760	141	23	30	11,394	62	10.04	2.42	4.15	0.76	27.7	6.7	1.05	.279	3.20	66	2.91	68	7.07	454.6
4	Lefty Grove L. Grove	.680	457	300	141	616	3.06	2,266	298	35	54	3940.2	3,849	1,339	1,594	162	1,187	42	123		16,622	51	5.18	2.71	1.91	0.37	13.6	7.1	1.28	.284	3.64	68	3.36	76	8.79	462.8
5	Christy Mathewson C. Mathewson	.665	552	373	188	636	2.13	2,507	435	79	30	4788.2	4,219	1,135	1,620	89	848	59	73		18,913	115	4.71	1.59	2.96	0.17	13.3	4.5	1.06	.268	3.04	75	2.26	76	7.93	363
6	Roger Clemens R. Clemens	.658	707	354	184	709	3.12	4,672	118	46	0	4916.2	4,185	1,707	1,885	363	1,580	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
7	Max Scherzer M. Scherzer	.657	457	215	112	466	3.16	3,407	12	5	0	2878.0	2,346	1,010	1,083	335	756	112	2	20	11,629	78	10.65	2.36	4.51	1.05	29.3	6.5	1.08	.287	3.39	76	3.17	77	7.34	310.2
8	John Clarkson J. Clarkson	.648	518	328	178	531	2.81	1,978	485	37	5	4536.1	4,295	1,417	2,384	159	1,191	80	12		19,146	182	3.92	2.36	1.66	0.32	10.3	6.2	1.21	.263	4.73	75	3.35	88	8.52	289.8
9	Randy Johnson R. Johnson	.646	603	303	166	618	3.29	4,875	100	37	2	4135.1	3,346	1,513	1,703	411	1,497	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
10	Grover Alexander G. Alexander	.642	600	373	208	696	2.56	2,198	436	90	32	5190.0	4,868	1,476	1,852	165	951	70	81		20,893	38	3.81	1.65	2.31	0.29	10.5	4.6	1.12	.269	3.21	73	2.88	81	8.44	359.1
11	Justin Verlander J. Verlander	.641	526	262	147	526	3.30	3,416	26	9	0	3415.2	2,891	1,252	1,354	355	952	115	0	27	13,945	97	9.00	2.51	3.59	0.94	24.5	6.8	1.13	.278	3.57	78	3.41	81	7.62	308.9
12	Mike Mussina M. Mussina	.638	536	270	153	537	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	1.98	3.58	0.95	19.3	5.4	1.19	.292	3.94	82	3.57	79	8.74	372.8
13	Jim Palmer J. Palmer	.638	521	268	152	558	2.86	2,212	211	53	4	3948.0	3,349	1,253	1,395	303	1,311	38	15	37	16,114	85	5.04	2.99	1.69	0.69	13.7	8.1	1.18	.249	3.18	80	3.50	95	7.63	83.2
14	Kid Nichols K. Nichols	.634	562	361	208	621	2.96	1,881	532	48	17	5067.1	4,929	1,664	2,480	156	1,272	129	56		21,082	169	3.34	2.26	1.48	0.28	8.9	6.0	1.22	.271	4.40	73	3.48	85	8.75	377.8
15	Dwight Gooden D. Gooden	.634	410	194	112	430	3.51	2,293	68	24	3	2800.2	2,564	1,091	1,198	210	954	78	4	42	11,705	76	7.37	3.07	2.40	0.67	19.6	8.2	1.26	.288	3.85	90	3.32	83	8.24	182.1
16	Juan Marichal J. Marichal	.631	457	243	142	471	2.89	2,303	244	52	2	3507.0	3,153	1,126	1,329	320	709	40	11	82	14,236	51	5.91	1.82	3.25	0.82	16.2	5.0	1.10	.261	3.41	81	3.04	88	8.09	154.8
17	Jon Lester J. Lester	.631	451	200	117	452	3.66	2,488	15	4	0	2740.0	2,610	1,114	1,215	294	892	90	0	13	11,487	63	8.17	2.93	2.79	0.97	21.7	7.8	1.28	.300	3.99	86	3.77	92	8.57	101.7
18	Eddie Plank E. Plank	.627	529	326	194	623	2.35	2,246	410	69	23	4495.2	3,958	1,174	1,566	42	1,072	190	77		17,803	88	4.50	2.15	2.10	0.08	12.6	6.0	1.12	.275	3.14	81	2.45	86	7.92	195.2
19	Andy Pettitte A. Pettitte	.626	521	256	153	531	3.85	2,448	26	4	0	3316.0	3,448	1,418	1,572	288	1,031	55	3	42	14,074	69	6.64	2.80	2.37	0.78	17.4	7.3	1.35	.308	4.27	86	3.73	83	9.36	282.1
20	Tim Hudson T. Hudson	.625	479	222	133	482	3.49	2,080	26	13	0	3126.2	2,957	1,213	1,319	248	917	124	0	84	13,005	84	5.99	2.64	2.27	0.71	16.0	7.1	1.24	.281	3.80	83	3.78	90	8.51	152.3
21	Carl Hubbell C. Hubbell	.622	433	253	154	535	2.98	1,677	260	36	33	3590.1	3,461	1,188	1,380	227	725	53	82		14,805	53	4.20	1.82	2.31	0.57	11.3	4.9	1.17	.267	3.46	76	3.55	89	8.68	174.2
22	Bob Feller B. Feller	.621	484	266	162	570	3.25	2,581	279	44	22	3827.0	3,271	1,384	1,557	224	1,764	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
23	Cy Young C. Young	.618	815	511	316	906	2.63	2,803	749	76	17	7356.0	7,092	2,147	3,167	138	1,217	161	84		29,565	156	3.43	1.49	2.30	0.17	9.5	4.1	1.13	.275	3.87	74	2.84	79	8.68	620
24	Old Hoss Radbourn O. Hoss Radbourn	.614	502	309	194	527	2.68	1,830	488	35	3	4527.1	4,328	1,347	2,273	118	875	54	24		18,918	214	3.64	1.74	2.09	0.23	9.7	4.6	1.15	.262	4.52	82	3.15	95	8.60	51
25	Greg Maddux G. Maddux	.610	740	355	227	744	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	1.80	3.37	0.63	16.5	4.9	1.14	.281	3.56	76	3.25	78	8.49	519.5