Lou Gehrig has the best OPS by a Yankees first baseman in a season, with an OPS of 1.240 in 1927.

Interpreted as:

highest ops with a minimum of 1.55 PA per team game by a yankees 1b in a season

	NAME	OPS	SEASON	TM	G	AB	R	H	2B	3B	HR	RBI	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	SF	IBB	GIDP	AVG	OBP	SLG	wRC	WRAA	wOBA	wRC+	BRAA
1	Lou Gehrig L. Gehrig	1.240	1927	NYY	155	584	149	218	52	18	47	173	109	3	84	10	8	717	447	117	21				.373	.474	.765	199	110.9	.540	209	105.6
2	Lou Gehrig L. Gehrig	1.194	1930	NYY	154	581	143	220	42	17	41	173	101	3	63	12	14	703	419	100	18				.379	.473	.721	193	94.5	.507	198	98.3
3	Lou Gehrig L. Gehrig	1.174	1936	NYY	155	579	167	205	37	7	49	152	130	7	46	3	4	719	403	93	3				.354	.478	.696	192	97.6	.512	178	85.8
4	Lou Gehrig L. Gehrig	1.172	1934	NYY	154	579	128	210	40	6	49	166	109	2	31	9	5	690	409	95	0				.363	.465	.706	182	94.8	.511	194	90.9
5	Lou Gehrig L. Gehrig	1.116	1937	NYY	157	569	138	200	37	9	37	158	127	4	49	4	3	700	366	83	0				.351	.473	.643	173	85.5	.494	176	76.5
6	Lou Gehrig L. Gehrig	1.115	1928	NYY	154	562	139	210	47	13	27	147	95	4	69	4	11	677	364	87	16				.374	.467	.648	165	82.1	.496	192	80.9
7	Lou Gehrig L. Gehrig	1.108	1931	NYY	155	619	163	211	31	15	46	185	117	0	56	17	12	738	410	92	2				.341	.446	.662	179	87.7	.488	184	83.8
8	Lou Gehrig L. Gehrig	1.072	1932	NYY	156	596	138	208	42	9	34	151	108	3	38	4	11	708	370	85	1				.349	.451	.621	167	77.9	.472	174	73.4
9	Lou Gehrig L. Gehrig	1.049	1935	NYY	149	535	125	176	26	10	30	120	132	5	38	8	7	672	312	66	0				.329	.466	.583	154	70.5	.471	171	66.2
10	Jason Giambi J. Giambi	1.034	2002	NYY	155	560	120	176	34	1	41	122	109	15	112	2	2	689	335	76	0	5	4	18	.314	.435	.598	148	64.8	.440	175	63.6
11	Lou Gehrig L. Gehrig	1.030	1933	NYY	152	593	138	198	41	12	32	140	92	1	42	9	13	687	359	85	1				.334	.424	.605	149	69.6	.462	168	62.5
12	Lou Gehrig L. Gehrig	1.015	1929	NYY	154	553	127	166	32	10	35	125	122	5	68	4	3	692	323	77	12				.300	.431	.584	148	56.2	.449	162	58.1
13	Jason Giambi J. Giambi	.975	2005	NYY	139	417	74	113	14	0	32	87	108	19	109	0	0	545	223	46	0	1	5	7	.271	.440	.535	109	43.5	.422	164	42.9
14	Lou Gehrig L. Gehrig	.969	1926	NYY	155	572	135	179	47	20	16	109	105	1	73	6	5	696	314	83	18				.313	.420	.549	136	52.6	.441	151	47.3
15	Don Mattingly D. Mattingly	.967	1986	NYY	162	677	117	238	53	2	31	113	53	1	35	0	0	742	388	86	1	10	11	17	.352	.394	.573	141	55.9	.416	160	54.2
16	Tino Martinez T. Martinez	.948	1997	NYY	158	594	96	176	31	2	44	141	75	3	75	3	1	685	343	77	0	13	14	15	.296	.371	.577	121	36.3	.396	141	35.8
17	Mark Teixeira M. Teixeira	.948	2009	NYY	156	609	103	178	43	3	39	122	81	12	114	2	0	707	344	85	0	5	9	13	.292	.383	.565	128	43	.402	142	36.8
18	Luke Voit L. Voit	.948	2020	NYY	56	213	41	59	5	0	22	52	17	3	54	0	0	234	130	27	0	1	0	4	.277	.338	.610	44	14.5	.393	153	15.3
19	Johnny Mize J. Mize	.946	1950	NYY	90	274	43	76	12	0	25	72	29	2	24	0	1	305	163	37	0			4	.277	.351	.595	55	17	.414	134	14.5
20	Jason Giambi J. Giambi	.939	2003	NYY	156	535	97	134	25	0	41	107	129	21	140	2	1	690	282	66	0	5	9	9	.250	.412	.527	128	43.1	.402	149	42.1
21	Don Mattingly D. Mattingly	.939	1985	NYY	159	652	107	211	48	3	35	145	56	2	41	2	2	727	370	86	2	15	13	15	.324	.371	.567	129	46.9	.400	152	44.9
22	Don Mattingly D. Mattingly	.937	1987	NYY	141	569	93	186	38	2	30	115	51	1	38	1	4	629	318	70	0	8	13	16	.327	.378	.559	113	35.6	.394	142	33.5
23	Jim Leyritz J. Leyritz	.935	1993	NYY	95	259	43	80	14	0	14	53	37	8	59	0	0	305	136	28	0	1	3	12	.309	.410	.525	57	20.7	.411	153	20
24	Lou Gehrig L. Gehrig	.932	1938	NYY	157	576	115	170	32	6	29	114	107	5	75	6	1	689	301	67	1				.295	.410	.523	131	44.6	.423	133	33
25	Don Mattingly D. Mattingly	.918	1984	NYY	153	603	91	207	44	2	23	110	41	1	33	1	1	662	324	69	8	9	8	15	.343	.381	.537	116	42.4	.401	153	41