highest batting average by a 1b in a season minimum 500 at bats

George Sisler has the best batting average by a first baseman with 500+ at-bats in a season, with an average of .420 in 1922.

	NAME	AVG	AB	SEASON	TM	G	R	H	2B	3B	HR	RBI	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	SF	IBB	GIDP	OBP	SLG	OPS	WRC	WRAA	WOBA	WRC+	BRAA
1	George Sisler G. Sisler	.420	586	1922	SLA	142	134	246	42	18	8	105	49	3	14	51	19	654	348	68	16				.467	.594	1.061	152	70.1	.481	170	61.2
2	George Sisler G. Sisler	.407	631	1920	SLA	154	137	257	49	18	19	122	46	2	19	42	17	692	399	86	13				.449	.632	1.082	161	82.5	.494	176	68.6
3	Bill Terry B. Terry	.401	633	1930	NYG	154	139	254	39	15	23	129	57	1	33	8		710	392	77	19				.452	.619	1.071	171	71.2	.468	156	62.1
4	Rod Carew R. Carew	.388	616	1977	MIN	155	128	239	38	16	14	100	69	3	55	23	13	694	351	68	1	5	15	6	.449	.570	1.019	145	64.4	.440	175	61.4
5	Lou Gehrig L. Gehrig	.379	581	1930	NYY	154	143	220	42	17	41	173	101	3	63	12	14	703	419	100	18				.473	.721	1.194	193	94.5	.507	198	98.3
6	Lou Gehrig L. Gehrig	.374	562	1928	NYY	154	139	210	47	13	27	147	95	4	69	4	11	677	364	87	16				.467	.648	1.115	165	82.1	.496	192	80.9
7	Lou Gehrig L. Gehrig	.373	584	1927	NYY	155	149	218	52	18	47	173	109	3	84	10	8	717	447	117	21				.474	.765	1.240	199	110.9	.540	209	105.6
8	Todd Helton T. Helton	.372	580	2000	COL	160	138	216	59	2	42	147	103	4	61	5	3	697	405	103	0	10	22	12	.463	.698	1.162	174	82.4	.476	161	58
9	Bill Terry B. Terry	.372	607	1929	NYG	150	103	226	39	5	14	117	48	0	35	10		673	317	58	18				.418	.522	.941	130	41.1	.425	133	33
10	Tommy Tucker T. Tucker	.372	527	1889	BAL	134	103	196	22	11	5	99	42	33	26	63		602	255	38					.450	.484	.934	149	56.2	.446	158	55.3
11	George Sisler G. Sisler	.371	582	1921	SLA	138	125	216	38	18	12	104	34	5	27	35	11	635	326	68	14				.411	.560	.971	125	46	.437	140	35.3
12	Cap Anson C. Anson	.371	504	1886	CWS	125	117	187	35	11	10	147	55		19	29		559	274	56						.544		146	64.6	.451	164	54.6
13	Jim Bottomley J. Bottomley	.371	523	1923	SLN	134	79	194	34	14	8	94	45	4	44	4	6	587	280	56	15				.425	.535	.960	116	43.6	.440	154	41.1
14	Lew Fonseca L. Fonseca	.369	566	1929	CLE	148	97	209	44	15	6	103	50	7	23	19	11	643	301	65	20				.427	.532	.959	128	43.3	.432	144	38.2
15	Jim Bottomley J. Bottomley	.367	619	1925	SLN	153	92	227	44	12	21	128	47	2	36	3	4	681	358	77	13				.413	.578	.992	140	51	.443	150	46.5
16	Stan Musial S. Musial	.365	624	1946	SLN	156	124	228	50	20	16	103	73	3	31	7		702	366	86	2			7	.434	.587	1.021	145	71.3	.468	187	67.3
17	Johnny Mize J. Mize	.364	560	1937	SLN	145	103	204	40	7	25	113	56	5	57	2		621	333	72	0			5	.427	.595	1.021	135	57.1	.456	174	56.5
18	Jimmie Foxx J. Foxx	.364	585	1932	PHA	154	151	213	33	9	58	169	116	0	96	3	7	701	438	100	0				.469	.749	1.218	193	105.6	.522	198	95.8
19	John Olerud J. Olerud	.363	551	1993	TOR	158	109	200	54	2	24	107	114	7	65	0	2	679	330	80	0	7	33	12	.473	.599	1.072	151	69.8	.454	180	66.6
20	Lou Gehrig L. Gehrig	.363	579	1934	NYY	154	128	210	40	6	49	166	109	2	31	9	5	690	409	95	0				.465	.706	1.172	182	94.8	.511	194	90.9
21	Nap Lajoie N. Lajoie	.361	545	1897	PHI	127	107	197	40	23	9	127	15	12	25	20		577	310	72	5				.392	.569	.960	127	40.4	.436	142	38.2
22	Charlie Hickman C. Hickman	.361	534	1902	TOT	130	74	193	36	13	11	110	15	7	15	9		564	288	60	8				.387	.539	.926	112	45.8	.433	147	36.2
23	Norm Cash N. Cash	.361	535	1961	DET	159	119	193	22	8	41	132	124	9	85	11	5	672	354	71	2	2	19	16	.487	.662	1.148	168	88.3	.488	194	79.5
24	Todd Helton T. Helton	.358	583	2003	COL	160	135	209	49	5	33	117	111	2	72	0	4	703	367	87	0	7	21	19	.458	.630	1.088	160	73.6	.453	163	56.6
25	George Burns G. Burns	.358	603	1926	CLE	151	97	216	64	3	4	115	28	8	33	13	7	657	298	71	18				.394	.494	.889	113	33.6	.410	128	24.6