Luke Appling had the best on-base percentage in the AL in 1943, with an on-base percentage of .419.

Interpreted as:

best obp with a minimum of 3.1 PA per team game by a player in the al in 1943

	NAME	OBP	SEASON	TM	G	AB	R	H	2B	3B	HR	RBI	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	GIDP	AVG	SLG	OPS	WRC	WRAA	WOBA	WRC+	BRAA
1	Luke Appling L. Appling	.419	1943	CWS	155	585	63	192	33	2	3	80	90	1	29	27	8	677	238	38	1	13	.328	.407	.825	105	35.6	.398	146	33.3
2	Roy Cullenbine R. Cullenbine	.407	1943	CLE	138	488	66	141	24	4	8	56	96	1	58	3	4	598	197	36	13	8	.289	.404	.811	90	29.1	.393	145	28.9
3	Charlie Keller C. Keller	.396	1943	NYY	141	512	97	139	15	11	31	86	106	0	60	7	5	620	269	57	2	7	.271	.525	.922	111	47.8	.434	167	44.5
4	Lou Boudreau L. Boudreau	.388	1943	CLE	152	539	69	154	32	7	3	67	90	0	31	4	7	649	209	42	20	12	.286	.388	.776	90	23.7	.375	134	23.4
5	Guy Curtright G. Curtright	.382	1943	CWS	138	488	67	142	20	7	3	48	69	3	60	13	12	572	185	30	12	11	.291	.379	.761	76	18.2	.368	126	16.2
6	Dick Wakefield D. Wakefield	.377	1943	DET	155	633	91	200	38	8	7	79	62	0	60	4	5	697	275	53	2	23	.316	.434	.811	102	30.7	.386	131	23.3
7	Jeff Heath J. Heath	.369	1943	CLE	118	424	58	116	22	6	18	79	63	1	58	5	8	488	204	46	0	4	.274	.481	.850	77	27.1	.402	151	26.9
8	Rudy York R. York	.366	1943	DET	155	571	90	155	22	11	34	118	84	1	88	5	5	661	301	67	5	22	.271	.527	.893	112	44.4	.419	153	37.4
9	Stan Spence S. Spence	.366	1943	WSH	149	570	72	152	23	10	12	88	84	5	39	8	1	663	231	45	4	9	.267	.405	.771	90	22.3	.371	129	20.7
10	Joe Gordon J. Gordon	.365	1943	NYY	152	543	82	135	28	5	17	69	98	2	75	4	7	650	224	50	7	18	.249	.413	.778	90	23.7	.375	129	20.1
11	Bob Johnson B. Johnson	.362	1943	WSH	117	438	65	116	22	8	7	63	64	3	50	11	5	505	175	37	0	11	.265	.400	.762	67	15.4	.367	126	14.2
12	Milt Byrnes M. Byrnes	.362	1943	SLA	129	429	58	120	28	7	4	50	53	2	49	1	4	492	174	39	8	9	.280	.406	.767	65	15.2	.367	121	11.1
13	Mickey Vernon M. Vernon	.357	1943	WSH	145	553	89	148	29	8	7	70	67	10	55	24	8	638	214	44	8	10	.268	.387	.744	81	16.1	.359	121	14.5
14	Vern Stephens V. Stephens	.357	1943	SLA	137	512	75	148	27	3	22	91	54	0	73	3	2	571	247	52	5	11	.289	.482	.839	88	29.5	.397	140	24.7
15	Nick Etten N. Etten	.355	1943	NYY	154	583	78	158	35	5	14	107	76	0	31	3	7	665	245	54	6	13	.271	.420	.775	90	22.2	.371	126	18.6
16	Jerry Priddy J. Priddy	.350	1943	WSH	149	560	68	152	31	3	4	62	67	1	76	5	5	635	201	38	7	17	.271	.359	.709	74	9.1	.344	111	7.6
17	Pinky Higgins P. Higgins	.349	1943	DET	138	523	63	145	20	1	10	84	57	1	31	2	5	592	197	31	11	17	.277	.377	.726	72	11.4	.351	108	5.2
18	Jake Early J. Early	.346	1943	WSH	126	423	37	109	23	3	5	60	53	4	43	5	3	484	153	31	4	6	.258	.362	.708	56	6.9	.343	111	5.7
19	Billy Johnson B. Johnson	.344	1943	NYY	155	592	70	166	24	6	5	94	53	4	30	3	5	655	217	35	6	27	.280	.367	.710	75	8.7	.342	107	5.2
20	George Case G. Case	.341	1943	WSH	141	613	102	180	36	5	1	52	41	3	27	61	14	660	229	42	3	3	.294	.374	.715	76	8.7	.342	110	7.1
21	Bobby Doerr B. Doerr	.339	1943	BSA	155	604	78	163	32	3	16	75	62	1	59	8	8	676	249	51	9	11	.270	.412	.751	86	17.1	.359	117	12.7
22	Chet Laabs C. Laabs	.338	1943	SLA	151	580	83	145	27	7	17	85	73	4	105	5	7	665	237	51	8	13	.250	.409	.747	84	16.3	.358	115	10.6
23	Pete Fox P. Fox	.337	1943	BSA	127	489	54	141	24	4	2	44	34	2	40	22	8	543	179	30	18	11	.288	.366	.703	61	5.4	.337	103	1.9
24	Harlond Clift H. Clift	.336	1943	TOT	113	409	47	97	11	3	3	29	59	2	40	5	4	477	123	17	7	11	.237	.301	.637	46	-2.5	.316	88	-6.3
25	Thurman Tucker T. Tucker	.336	1943	CWS	139	528	81	124	15	6	3	39	79	1	72	29	17	616	160	24	8	5	.235	.303	.639	60	-3	.316	92	-5.1