mlb best batting average age 21 or younger all-time single season

Charley O'Leary is the oldest with a batting average of .210 or above in a season. He was 58 years old in 1934.

Interpreted as:

MLB best batting average age by a player 21 or higher or younger all-time single season

	NAME	AGE	AVG	SEASON	TM	G	AB	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	Charley O'Leary C. O'Leary	58	1.000	1934	SLA	1	1	1	1	0	0	0	0	0	0	0	0	0	1	1	0	0				1.000	1.000	2.000	1	0.5	.932	425	0.5
2	Jim O'Rourke J. O'Rourke	53	.250	1904	NYG	1	4	1	1	0	0	0	0	0	0	0	0		4	1	0	0				.250	.250	.500	0	-0.2	.238	54	-0.2
3	Nick Altrock N. Altrock	52	1.000	1929	WSH	1	1	0	1	0	0	0	0	0	0	0	0	0	1	1	0	0				1.000	1.000	2.000	1	0.5	.931	457	0.5
4	Julio Franco J. Franco	48	.222	2007	TOT	55	90	8	20	3	0	1	16	14	0	23	2	1	106	26	4	0	2	1	2	.321	.289	.610	9	-4.6	.279	64	-5
5	Deacon McGuire D. McGuire	48	.500	1912	DET	1	2	1	1	0	0	0	0	0	0	0	0		2	1	0	0				.500	.500	1.000	0	0.2	.480	185	0.2
6	Julio Franco J. Franco	47	.273	2006	NYM	95	165	14	45	10	0	2	26	13	1	49	6	1	179	61	12	0	0	2	11	.330	.370	.699	19	-3.8	.306	82	-4.1
7	Jack Quinn J. Quinn	47	.265	1930	PHA	35	34	2	9	0	0	1	4	1	0	9	0	0	35	12	1	0				.286	.353	.639	3	-2.1	.287	53	-2.3
8	Nick Altrock N. Altrock	47	1.000	1924	WSH	1	1	1	1	0	1	0	0	0	0	0	0	0	1	3	1	0				1.000	3.000	4.000	1	1	1.656	860	1
9	Julio Franco J. Franco	46	.275	2005	ATL	108	233	30	64	12	1	9	42	27	1	57	4	0	265	105	22	1	3	1	10	.348	.451	.799	36	4.5	.347	110	3.3
10	Jimmy Austin J. Austin	46	.500	1926	SLA	1	2	1	1	1	0	0	1	0	0	0	1	0	2	2	1	0				.500	1.000	1.500	1	0.5	.662	273	0.5
11	Deacon McGuire D. McGuire	46	.333	1910	CLE	1	3	0	1	0	0	0	0	0	1	0	0		4	1	0	0				.500	.333	.833	1	0.3	.436	178	0.3
12	Sam Thompson S. Thompson	46	.226	1906	DET	8	31	3	7	0	1	0	3	1	0	5	0		32	9	1	0				.250	.290	.540	2	-0.9	.262	66	-1.1
13	Omar Vizquel O. Vizquel	45	.235	2012	TOR	60	153	13	36	5	1	0	7	7	0	17	3	2	163	43	6	1	2	0	5	.265	.281	.546	9	-9.5	.242	45	-10.6
14	Julio Franco J. Franco	45	.309	2004	ATL	125	320	37	99	18	3	6	57	36	1	68	4	2	361	141	27	1	3	4	10	.378	.441	.818	52	7.7	.355	114	6.3
15	Pete Rose P. Rose	45	.219	1986	CIN	72	237	15	52	8	2	0	25	30	4	31	3	0	272	64	10	0	1	0	2	.316	.270	.586	22	-9.2	.278	66	-10.7
16	Grover Hartley G. Hartley	45	.333	1934	SLA	5	3	0	1	1	0	0	0	1	0	0	0	0	4	2	1	0				.500	.667	1.167	1	0.5	.511	181	0.5
17	Kid Gleason K. Gleason	45	.500	1912	CWS	1	2	0	1	0	0	0	0	0	0	0	0		2	1	0	0				.500	.500	1.000	0	0.2	.480	190	0.2
18	Cap Anson C. Anson	45	.285	1897	CHI	114	424	67	121	17	3	3	75	60	4	27	11		497	153	23	9				.379	.361	.740	79	4	.363	100	-0.2
19	Omar Vizquel O. Vizquel	44	.251	2011	CWS	58	167	18	42	7	1	0	8	9	0	18	1	2	182	51	8	4	2	0	2	.287	.305	.592	13	-7.5	.264	57	-9
20	Roger Clemens R. Clemens	44	.500	2007	NYY	2	2	0	1	0	0	0	0	0	0	0	0	0	2	1	0	0	0	0	0	.500	.500	1.000	0	0.2	.448	177	0.2
21	Julio Franco J. Franco	44	.294	2003	ATL	103	197	28	58	12	2	5	31	25	0	43	0	1	223	89	19	0	1	5	8	.372	.452	.824	32	4.8	.353	112	3.5
22	Carlton Fisk C. Fisk	44	.229	1992	CWS	62	188	12	43	4	1	3	21	23	1	38	3	0	214	58	8	0	2	5	2	.313	.309	.622	17	-5.7	.281	75	-6
23	Tony Perez T. Perez	44	.255	1986	CIN	77	200	14	51	12	1	2	29	25	0	25	0	0	228	71	15	0	3	2	6	.333	.355	.688	24	-2	.309	88	-3.2
24	Pete Rose P. Rose	44	.264	1985	CIN	119	405	60	107	12	2	2	46	86	4	35	8	1	500	129	16	1	4	5	10	.395	.319	.713	63	6.3	.334	107	4
25	Dutch Leonard D. Leonard	44	.300	1953	CHC	45	10	0	3	1	0	0	2	0	0	1	0	0	10	4	1	0			0	.300	.400	.700	1	-0.2	.313	75	-0.3