Babe Ruth has the highest on-base percentage for the Yankees in a season, with an on-base percentage of .545 in 1923.

Interpreted as:

best obp with a minimum of 1.55 PA per team game by yankee player in a season

	NAME	OBP	SEASON	TM	G	AB	R	H	2B	3B	HR	RBI	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	SF	IBB	GIDP	AVG	SLG	OPS	wRC	WRAA	wOBA	wRC+	BRAA
1	Babe Ruth B. Ruth	.545	1923	NYY	152	522	151	205	45	13	41	130	170	4	93	17	21	699	399	99	3				.393	.764	1.309	211	124.7	.571	230	120.4
2	Babe Ruth B. Ruth	.532	1920	NYY	142	458	158	172	36	9	54	135	150	3	80	14	14	616	388	99	5				.376	.847	1.379	191	120.9	.597	237	110.5
3	Babe Ruth B. Ruth	.516	1926	NYY	152	495	139	184	30	5	47	153	144	3	76	11	9	652	365	82	10				.372	.737	1.253	184	105.6	.551	216	100.6
4	Babe Ruth B. Ruth	.513	1924	NYY	153	529	143	200	39	7	46	124	142	4	81	9	13	681	391	92	6				.378	.739	1.252	193	109.2	.549	210	102
5	Babe Ruth B. Ruth	.512	1921	NYY	152	540	177	204	44	16	59	168	145	4	81	17	13	693	457	119	4				.378	.846	1.359	214	127.8	.575	224	118.7
6	Mickey Mantle M. Mantle	.512	1957	NYY	144	474	121	173	28	6	34	94	146	0	75	16	3	623	315	68	0	3	23	5	.365	.665	1.177	157	87.1	.498	217	86
7	Babe Ruth B. Ruth	.495	1931	NYY	145	534	149	199	31	3	46	162	128	1	51	5	4	663	374	80	0				.373	.700	1.195	181	98.6	.525	206	95.1
8	Babe Ruth B. Ruth	.493	1930	NYY	145	518	150	186	28	9	49	153	136	1	61	10	10	676	379	86	21				.359	.732	1.225	192	97	.517	204	100.6
9	Babe Ruth B. Ruth	.489	1932	NYY	133	457	120	156	13	5	41	137	130	2	62	2	2	589	302	59	0				.341	.661	1.150	153	79.1	.501	192	75.3
10	Mickey Mantle M. Mantle	.486	1962	NYY	123	377	96	121	15	1	30	89	122	1	78	9	0	502	228	46	0	2	9	4	.321	.605	1.091	118	59.5	.472	192	57.6
11	Babe Ruth B. Ruth	.486	1927	NYY	151	540	158	192	29	8	60	165	137	0	89	7	6	691	417	97	14				.356	.772	1.258	195	109.9	.545	212	104.8
12	Lou Gehrig L. Gehrig	.478	1936	NYY	155	579	167	205	37	7	49	152	130	7	46	3	4	719	403	93	3				.354	.696	1.174	192	97.6	.512	178	85.8
13	Lou Gehrig L. Gehrig	.474	1927	NYY	155	584	149	218	52	18	47	173	109	3	84	10	8	717	447	117	21				.373	.765	1.240	199	110.9	.540	209	105.6
14	Lou Gehrig L. Gehrig	.473	1930	NYY	154	581	143	220	42	17	41	173	101	3	63	12	14	703	419	100	18				.379	.721	1.194	193	94.5	.507	198	98.3
15	Lou Gehrig L. Gehrig	.473	1937	NYY	157	569	138	200	37	9	37	158	127	4	49	4	3	700	366	83	0				.351	.643	1.116	173	85.5	.494	176	76.5
16	Lou Gehrig L. Gehrig	.467	1928	NYY	154	562	139	210	47	13	27	147	95	4	69	4	11	677	364	87	16				.374	.648	1.115	165	82.1	.496	192	80.9
17	Lou Gehrig L. Gehrig	.466	1935	NYY	149	535	125	176	26	10	30	120	132	5	38	8	7	672	312	66	0				.329	.583	1.049	154	70.5	.471	171	66.2
18	Lou Gehrig L. Gehrig	.465	1934	NYY	154	579	128	210	40	6	49	166	109	2	31	9	5	690	409	95	0				.363	.706	1.172	182	94.8	.511	194	90.9
19	Mickey Mantle M. Mantle	.464	1956	NYY	150	533	132	188	22	5	52	130	112	2	99	10	1	652	376	79	1	4	6	4	.353	.705	1.169	164	88.9	.498	202	84.6
20	Babe Ruth B. Ruth	.463	1928	NYY	154	536	163	173	29	8	54	146	137	3	87	4	5	684	380	91	8				.323	.709	1.172	174	90.6	.510	201	89.3
21	Paul O'Neill P. O'Neill	.460	1994	NYY	103	368	68	132	25	1	21	83	72	0	56	5	4	443	222	47	0	3	13	16	.359	.603	1.064	100	43.6	.450	172	42.1
22	Joe DiMaggio J. DiMaggio	.459	1949	NYY	76	272	58	94	14	6	14	67	55	2	18	0	1	329	162	34	0			11	.346	.596	1.055	74	34.6	.478	176	32.5
23	Aaron Judge A. Judge	.458	2024	NYY	158	559	122	180	36	1	58	144	133	9	171	10	0	703	392	95	0	2	20	22	.322	.701	1.159	176	93.7	.476	219	95.5
24	Aaron Judge A. Judge	.457	2025	NYY	152	541	137	179	30	2	53	114	124	7	160	12	5	679	372	85	0	7	36	16	.331	.688	1.144	163	82.5	.463	203	82.7
25	George Selkirk G. Selkirk	.452	1939	NYY	128	418	103	128	17	4	21	101	103	8	49	12	5	537	216	42	8			3	.306	.517	.969	110	43.7	.444	151	38.1