what pitcher has the most losses while only giving up one earned run

Nolan Ryan has the most career losses when allowing 1+ earned run, with 287 games.

Interpreted as:

What pitcher has the most regular-season losses while only giving up one or more earned run?

	NAME	L	ER	W	L%	G	W%	GS	ERA	SO	CG	SHO	SV	IP	H	R	HR	BB	HBP	GF	IBB	TBF	WP	K/9	BB/9	K/BB	HR/9	K%	BB%	WHIP	BABIP	RA	H/9
1	Nolan Ryan N. Ryan	287	1,911	206	.582	641	.418	626	4.06	4,384	153	0	1	4236.0	3,472	2,138	319	2,316	138	5	72	18,270	245	9.31	4.92	1.89	0.68	24.0	12.7	1.37	.284	4.54	7.38
2	Phil Niekro P. Niekro	265	2,012	234	.531	675	.469	628	4.01	2,768	189	0	2	4516.2	4,541	2,278	480	1,570	113	18	78	19,332	199	5.52	3.13	1.76	0.96	14.3	8.1	1.35	.282	4.54	9.05
3	Gaylord Perry G. Perry	263	1,846	226	.538	635	.462	601	3.73	2,918	230	0	0	4454.2	4,451	2,081	397	1,204	92	12	152	18,664	145	5.90	2.43	2.42	0.80	15.6	6.5	1.27	.288	4.20	8.99
4	Don Sutton D. Sutton	253	1,914	236	.517	655	.483	650	3.93	2,973	114	0	0	4381.1	4,200	2,074	472	1,156	73	3	85	18,310	103	6.11	2.37	2.57	0.97	16.2	6.3	1.22	.273	4.26	8.63
5	Bert Blyleven B. Blyleven	248	1,830	206	.546	595	.454	591	3.96	3,072	172	0	0	4164.0	4,195	2,000	430	1,168	133	2	64	17,533	102	6.64	2.52	2.63	0.93	17.5	6.7	1.29	.296	4.32	9.07
6	Robin Roberts R. Roberts	244	1,773	228	.517	577	.483	554	3.86	2,067	255	0	2	4136.1	4,261	1,944	504	822	48	13	68	17,205	31	4.50	1.79	2.51	1.10	12.0	4.8	1.23	.273	4.23	9.27
7	Early Wynn E. Wynn	241	1,793	226	.516	570	.484	541	4.19	1,949	226	0	2	3853.0	3,931	2,008	339	1,558	56	24	34	16,752	44	4.55	3.64	1.25	0.79	11.6	9.3	1.42	.280	4.69	9.18
8	Warren Spahn W. Spahn	240	1,801	283	.459	613	.541	584	3.64	2,134	306	0	2	4447.1	4,379	1,976	433	1,257	41	20	52	18,612	69	4.32	2.54	1.70	0.88	11.5	6.8	1.27	.268	4.00	8.86
9	Steve Carlton S. Carlton	239	1,864	252	.487	625	.513	611	3.82	3,501	192	0	1	4392.2	4,230	2,089	412	1,631	43	4	138	18,645	163	7.17	3.34	2.15	0.84	18.8	8.7	1.33	.292	4.28	8.67
10	Frank Tanana F. Tanana	232	1,702	183	.559	556	.441	549	4.24	2,323	106	0	0	3609.1	3,728	1,881	446	1,114	120	3	103	15,460	102	5.79	2.78	2.09	1.11	15.0	7.2	1.34	.286	4.69	9.30
11	Jim Kaat J. Kaat	230	1,738	216	.516	649	.484	557	4.15	2,091	139	0	1	3771.1	4,106	1,974	392	949	112	29	95	16,165	114	4.99	2.26	2.20	0.94	12.9	5.9	1.34	.294	4.71	9.80
12	Bob Friend B. Friend	228	1,436	144	.613	487	.387	446	4.24	1,460	119	0	1	3048.1	3,410	1,633	286	779	43	18	99	13,097	46	4.31	2.30	1.87	0.84	11.1	5.9	1.37	.297	4.82	10.07
13	Greg Maddux G. Maddux	225	1,756	255	.469	616	.531	613	3.90	2,705	69	0	0	4053.2	4,173	1,949	353	878	119	3	160	16,951	63	6.01	1.95	3.08	0.78	16.0	5.2	1.25	.296	4.33	9.26
14	Fergie Jenkins F. Jenkins	224	1,669	217	.508	552	.492	521	3.93	2,693	207	0	0	3824.2	3,787	1,831	484	874	75	14	101	15,944	59	6.34	2.06	3.08	1.14	16.9	5.5	1.22	.279	4.31	8.91
15	Tommy John T. John	224	1,749	200	.528	615	.472	595	4.14	1,778	105	0	0	3804.0	4,223	1,965	301	1,086	83	4	89	16,317	166	4.21	2.57	1.64	0.71	10.9	6.7	1.40	.300	4.65	9.99
16	Ted Lyons T. Lyons	222	1,696	216	.507	496	.493	440	4.14	980	314	0	4	3687.1	4,196	2,023	221	1,021	29	42		16,024	53	2.39	2.49	0.96	0.54	6.1	6.4	1.41	.289	4.94	10.24
17	Red Ruffing R. Ruffing	218	1,835	214	.505	520	.495	477	4.42	1,678	280	0	4	3737.0	3,966	2,089	253	1,398	53	29		16,305	42	4.04	3.37	1.20	0.61	10.3	8.6	1.44	.287	5.03	9.55
18	Bobo Newsom B. Newsom	216	1,664	168	.563	486	.438	439	4.56	1,824	208	0	2	3282.1	3,513	1,872	205	1,554	56	24		14,653	51	5.00	4.26	1.17	0.56	12.4	10.6	1.54	.300	5.13	9.63
19	Jamie Moyer J. Moyer	207	1,926	205	.502	596	.498	568	4.94	2,099	19	0	0	3508.1	3,902	2,054	522	1,032	131	5	67	15,234	54	5.38	2.65	2.03	1.34	13.8	6.8	1.41	.295	5.27	10.01
20	Charlie Hough C. Hough	205	1,582	152	.574	564	.426	400	4.72	1,816	85	0	10	3017.2	2,920	1,762	382	1,368	141	71	32	13,196	148	5.42	4.08	1.33	1.14	13.8	10.4	1.42	.267	5.26	8.71
21	Tom Seaver T. Seaver	205	1,521	222	.480	551	.520	548	3.47	2,992	163	0	0	3947.0	3,589	1,658	380	1,203	69	2	104	16,355	116	6.82	2.74	2.49	0.87	18.3	7.4	1.21	.274	3.78	8.18
22	Jerry Koosman J. Koosman	204	1,433	163	.556	485	.444	458	4.10	2,068	95	0	1	3147.0	3,205	1,566	289	1,035	62	13	113	13,387	82	5.91	2.96	2.00	0.83	15.4	7.7	1.35	.294	4.48	9.17
23	Paul Derringer P. Derringer	203	1,401	169	.546	450	.454	398	4.08	1,242	208	0	5	3091.0	3,543	1,594	157	676	29	29		13,328	46	3.62	1.97	1.84	0.46	9.3	5.1	1.36	.302	4.64	10.32
24	Tom Glavine T. Glavine	201	1,734	233	.463	593	.537	593	4.15	2,212	30	0	0	3758.0	3,908	1,868	356	1,342	60	0	139	16,135	59	5.30	3.21	1.65	0.85	13.7	8.3	1.40	.292	4.47	9.36
25	Joe Niekro J. Niekro	200	1,431	154	.565	517	.435	437	4.45	1,420	72	0	2	2895.2	3,079	1,581	274	1,084	57	28	62	12,583	154	4.41	3.37	1.31	0.85	11.3	8.6	1.44	.288	4.91	9.57