Between the 1920 and 1929 seasons, Rogers Hornsby had the best batting average, with an average of .382.

Interpreted as:

highest batting average with a minimum of 1.55 PA per team game by a player in 1920s

	NAME	AVG	G	AB	R	H	2B	3B	HR	RBI	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	OBP	SLG	OPS	WRC	WRAA	WOBA	WRC+	BRAA
1	Rogers Hornsby R. Hornsby	.382	1,430	5,451	1,195	2,085	405	115	250	1,153	753	24	431	74		6,389	3,470	770	161	.460	.637	1.096	1531	739.3	.490	186	714.6
2	Joe Jackson J. Jackson	.382	146	570	105	218	42	20	12	121	56	7	14	9	12	649	336	74	16	.444	.589	1.033	141	67.4	.474	167	56.5
3	Harry Heilmann H. Heilmann	.364	1,417	5,285	962	1,924	397	101	142	1,131	615	25	324	70		6,115	2,949	640	190	.433	.558	.991	1266	508.8	.450	153	441
4	Ty Cobb T. Cobb	.357	1,105	4,133	830	1,476	293	85	50	727	512	28	145	128		4,791	2,089	428	118	.431	.505	.937	919	328.7	.432	142	275.3
5	Chuck Klein C. Klein	.357	213	869	167	310	59	10	54	179	68	1	83	5		954	551	123	16	.404	.634	1.038	207	83.7	.456	145	61.3
6	Paul Waner P. Waner	.356	602	2,357	488	840	170	74	38	396	292	15	73	37		2,727	1,272	282	63	.431	.540	.970	546	206.5	.441	149	175.1
7	Al Simmons A. Simmons	.356	820	3,282	559	1,169	237	60	115	713	206	9	248	49		3,578	1,871	412	81	.396	.570	.966	697	247.5	.433	142	204.3
8	Babe Ruth B. Ruth	.355	1,399	4,884	1,365	1,734	314	82	467	1,338	1,240	27	795	88		6,224	3,613	863	73	.488	.740	1.228	1701	932.6	.535	206	884.9
9	Tristram Speaker T. Speaker	.354	1,170	4,226	830	1,496	397	74	72	726	636	26	104	58		5,034	2,257	543	146	.441	.534	.976	1023	405.6	.447	151	343.2
10	Lloyd Waner L. Waner	.348	453	1,950	388	678	67	40	12	162	114	19	56	28		2,129	861	119	46	.389	.442	.831	331	63	.384	113	36.2
11	George Sisler G. Sisler	.347	1,326	5,480	894	1,900	297	111	78	830	305	26	192	214		5,950	2,653	486	139	.384	.484	.868	977	239.2	.398	119	146.1
12	Eddie Collins E. Collins	.346	1,107	3,853	684	1,333	200	55	22	520	592	21	99	180		4,646	1,709	277	180	.436	.444	.879	824	252.6	.415	133	206.1
13	Dale Alexander D. Alexander	.343	155	626	110	215	43	15	25	137	56	0	63	5	9	700	363	83	18	.397	.580	.977	139	46.4	.431	143	40.9
14	Jimmie Foxx J. Foxx	.342	364	1,088	241	372	61	25	49	222	178	4	131	15		1,301	630	135	31	.436	.579	1.015	279	113.6	.454	160	104.1
15	Bob Fothergill B. Fothergill	.342	747	2,301	366	786	173	44	24	433	146	15	128	35		2,540	1,119	241	78	.385	.486	.871	420	104	.398	122	76.1
16	Riggs Stephenson R. Stephenson	.340	839	2,901	488	987	220	41	49	510	330	32	165	42		3,335	1,436	310	72	.413	.495	.908	605	189.2	.417	136	161.2
17	Zack Wheat Z. Wheat	.339	1,036	3,940	654	1,337	225	65	81	608	293	28	133	43		4,320	1,935	371	59	.389	.491	.880	730	198	.404	134	185.2
18	Happy Felsch H. Felsch	.338	142	556	88	188	40	15	14	115	37	4	25	8	13	613	300	69	16	.384	.540	.923	111	40.9	.424	138	30.6
19	Heinie Manush H. Manush	.338	911	3,311	575	1,119	216	72	57	534	231	46	167	73		3,709	1,650	345	121	.389	.498	.887	635	172.4	.405	126	129.4
20	Lou Gehrig L. Gehrig	.335	767	2,746	631	919	206	72	146	635	480	15	351	30		3,321	1,707	424	80	.436	.622	1.058	743	327.2	.470	170	313.1
21	Babe Herman B. Herman	.332	547	1,963	298	652	140	39	58	358	176	4	175	34		2,199	1,044	237	56	.388	.532	.920	396	122.2	.415	136	108.9
22	Edd Roush E. Roush	.332	1,148	4,458	698	1,479	236	111	50	630	318	23	132	142		4,937	2,087	397	138	.379	.468	.847	780	169.4	.389	127	168
23	Earl Averill E. Averill	.332	152	597	110	198	43	13	18	96	63	3	53	13	14	680	321	74	17	.398	.538	.936	127	37.3	.418	135	32
24	Kiki Cuyler K. Cuyler	.331	797	3,033	618	1,005	169	81	70	493	297	45	341	210		3,465	1,546	320	90	.399	.510	.909	620	185.3	.414	133	154.7
25	Earle Combs E. Combs	.331	762	3,094	614	1,025	174	84	27	304	324	11	164	58		3,481	1,448	285	52	.397	.468	.865	578	141.1	.398	127	125.6