the most games started with one run or less through 5 innings in a season

Ed Walsh has the most starts with 1 or fewer run allowed in a season, with 26 starts in 1908.

Interpreted as:

the most games started by a player with one run or less through 5 innings in a season

	NAME	GS	R	SEASON	TM	G	W	L	W%	ERA	SO	CG	SHO	SV	IP	H	ER	HR	BB	HBP	GF	IBB	TBF	WP	K/9	BB/9	K/BB	HR/9	K%	BB%	WHIP	BABIP	RA	H/9
1	Ed Walsh E. Walsh	26	17	1908	CWS	39	29	3	.906		165	25	11	5	257.2	148		0	27	6	13		937	4	5.76	0.94	6.11	0.00	17.6	2.9	0.68	.200	0.59	5.17
2	Ryne Stanek R. Stanek	25	15	2019	TOT	54	0	0		1.70	78	0	0	1	68.2	42	13	6	27	0	9	1	270	4	10.22	3.54	2.89	0.79	28.9	10.0	1.00	.226	1.97	5.50
3	Walter Johnson W. Johnson	25	13	1913	WSH	35	30	2	.938	0.22	177	20	11	2	244.1	131	6	2	27	6	10		871	0	6.52	0.99	6.56	0.07	20.3	3.1	0.65	.196	0.48	4.83
4	Bob Gibson B. Gibson	24	11	1968	STL	24	20	3	.870	0.37	183	22	13	0	218.2	116	9	1	40	3	0	4	796	3	7.53	1.65	4.58	0.04	23.0	5.0	0.71	.202	0.45	4.77
5	Jack Coombs J. Coombs	24	11	1910	PHA	28	25	0	1.000		164	24	13	1	241.2	128		0	74	6	4		904	6	6.11	2.76	2.22	0.00	18.1	8.2	0.84	.194	0.41	4.77
6	Christy Mathewson C. Mathewson	24	19	1904	NYG	26	23	1	.958		111	16	4	0	193.2	121		4	41	1	2		729	2	5.16	1.91	2.71	0.19	15.2	5.6	0.84	.205	0.88	5.62
7	Ryne Stanek R. Stanek	23	5	2018	TBR	51	2	1	.667	0.63	72	0	0	0	57.0	29	4	1	21	1	9	1	214	2	11.37	3.32	3.43	0.16	33.6	9.8	0.88	.235	0.79	4.58
8	Sandy Koufax S. Koufax	23	10	1963	LAD	23	17	1	.944	0.45	181	15	11	0	198.2	94	10	2	35	3	0	4	727	3	8.20	1.59	5.17	0.09	24.9	4.8	0.65	.182	0.45	4.26
9	Christy Mathewson C. Mathewson	23	10	1908	NYG	33	26	1	.963		152	20	11	3	217.2	111		2	15	2	9		782	0	6.28	0.62	10.13	0.08	19.4	1.9	0.58	.178	0.41	4.59
10	Dean Chance D. Chance	22	12	1964	LAA	31	17	3	.850	0.50	157	14	11	4	199.1	102	11	2	55	1	6	6	744	4	7.09	2.48	2.85	0.09	21.1	7.4	0.79	.189	0.54	4.61
11	Grover Alexander G. Alexander	22	6	1916	PHN	25	22	0	1.000	0.26	90	22	16	3	204.2	127	6	1	15	3	3		724	1	3.96	0.66	6.00	0.04	12.4	2.1	0.69	.205	0.26	5.58
12	Dylan Cease D. Cease	21	12	2022	CWS	21	14	2	.875	0.70	158	1	1	0	128.0	72	10	5	46	3	0	1	495	5	11.11	3.23	3.43	0.35	31.9	9.3	0.92	.237	0.84	5.06
13	Blake Snell B. Snell	21	12	2018	TBR	21	16	1	.941	0.78	163	0	0	0	127.1	58	11	6	44	0	0	2	471	5	11.52	3.11	3.70	0.42	34.6	9.3	0.80	.202	0.85	4.10
14	Zack Greinke Z. Greinke	21	10	2015	LAD	21	13	1	.929	0.55	143	0	0	0	148.0	85	9	5	24	2	0	0	546	3	8.70	1.46	5.96	0.30	26.2	4.4	0.74	.215	0.61	5.17
15	Babe Ruth B. Ruth	21	12	1916	BSA	23	17	1	.944	0.41	86	14	9	1	175.2	94	8	0	55	4	2		661	1	4.41	2.82	1.56	0.00	13.0	8.3	0.85	.182	0.61	4.82
16	Walter Johnson W. Johnson	21	13	1910	WSH	23	20	2	.909		171	20	8	1	195.1	106		0	32	3	2		708	8	7.88	1.47	5.34	0.00	24.2	4.5	0.71	.211	0.60	4.88
17	George McQuillan G. McQuillan	21	18	1908	PHN	27	16	5	.762		71	21	7	3	199.2	127		0	35	2	6		739	3	3.20	1.58	2.03	0.00	9.6	4.7	0.81	.201	0.81	5.72
18	Joe McGinnity J. McGinnity	21	12	1904	NYG	27	23	1	.958		68	19	9	2	202.0	116		0	36	5	6		752	1	3.03	1.60	1.89	0.00	9.0	4.8	0.75	.180	0.53	5.17
19	Julio Urías J. Urías	20	13	2022	LAD	20	13	2	.867	0.85	112	0	0	0	116.2	64	11	7	32	2	0	0	442	0	8.64	2.47	3.50	0.54	25.3	7.2	0.82	.197	1.00	4.94
20	Jon Lester J. Lester	20	13	2016	CHC	20	15	2	.882	0.76	134	2	0	0	142.1	87	12	7	25	2	0	0	522	1	8.47	1.58	5.36	0.44	25.7	4.8	0.79	.226	0.82	5.50
21	Jake Arrieta J. Arrieta	20	9	2015	CHC	20	18	1	.947	0.48	158	4	3	0	148.2	68	8	1	22	5	0	0	532	3	9.57	1.33	7.18	0.06	29.7	4.1	0.61	.194	0.54	4.12
22	Roger Clemens R. Clemens	20	10	1997	TOR	20	17	1	.944	0.57	185	8	3	0	159.0	90	10	2	39	5	0	0	595	2	10.47	2.21	4.74	0.11	31.1	6.6	0.81	.242	0.57	5.09
23	Vida Blue V. Blue	20	9	1971	OAK	20	16	2	.889	0.37	168	16	8	0	170.0	82	7	0	40	2	0	0	620	5	8.89	2.12	4.20	0.00	27.1	6.5	0.72	.200	0.48	4.34
24	Sandy Koufax S. Koufax	20	14	1966	LAD	20	18	0	1.000	0.67	188	16	5	0	174.0	107	13	4	38	0	0	2	652	3	9.72	1.97	4.95	0.21	28.8	5.8	0.83	.244	0.72	5.53
25	Dick Ellsworth D. Ellsworth	20	14	1963	CHC	20	16	2	.889	0.59	92	13	4	0	166.2	97	11	3	37	1	0	5	627	0	4.97	2.00	2.49	0.16	14.7	5.9	0.80	.190	0.76	5.24