The Pittsburgh Pirates had the highest batting average by a team in October 2021, with an average of .349.

	TEAM	AVG	MONTH	G	W%	W	L	AB	R	H	2B	3B	HR	RBI	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	SF	IBB	GIDP	OBP	SLG	OPS
1	Pirates	.349	October 2021	3	.667	2	1	106	20	37	4	3	2	19	12	1	31	1	1	119	53	9	0	0	1	4	.420	.500	.920
2	Blue Jays	.349	October 2021	3	1.000	3	0	109	28	38	8	0	11	28	6	2	13	1	0	117	79	19	0	0	0	1	.393	.725	1.118
3	Diamondbacks	.309	October 2021	3	.667	2	1	110	23	34	11	1	4	22	10	0	22	2	2	120	59	16	0	0	1	0	.367	.536	.903
4	White Sox	.288	October 2021	7	.429	3	4	243	33	70	11	0	6	33	23	5	64	0	1	273	99	17	0	2	0	8	.359	.407	.766
5	Twins	.287	October 2021	3	.667	2	1	108	17	31	6	0	4	16	3	1	22	0	0	113	49	10	0	1	0	3	.310	.454	.763
6	Astros	.278	October 2021	18	.611	11	7	626	110	174	28	4	24	107	63	8	150	12	0	705	282	56	3	5	7	11	.349	.450	.799
7	Royals	.270	October 2021	3	.333	1	2	100	14	27	6	0	1	12	10	3	25	3	2	113	36	7	0	0	0	1	.354	.360	.714
8	Red Sox	.267	October 2021	14	.643	9	5	495	76	132	19	3	28	75	54	3	120	3	1	556	241	50	3	1	0	16	.342	.487	.829
9	Padres	.265	October 2021	3	.333	1	2	102	7	27	9	0	0	7	4	1	27	0	0	111	36	9	1	3	1	2	.291	.353	.644
10	Rockies	.264	October 2021	3	.333	1	2	106	15	28	4	1	4	14	8	0	29	2	0	115	46	9	1	0	0	3	.316	.434	.750
11	Dodgers	.255	October 2021	15	.600	9	6	498	74	127	20	0	22	73	48	4	119	17	0	556	213	42	3	3	6	10	.324	.428	.751
12	Athletics	.252	October 2021	3	.333	1	2	107	18	27	3	1	6	17	8	2	26	3	0	118	50	10	0	1	0	0	.314	.467	.781
13	Braves	.249	October 2021	18	.667	12	6	595	72	148	24	2	25	71	53	5	179	7	1	656	251	51	1	2	5	9	.315	.422	.736
14	Reds	.248	October 2021	3	.333	1	2	101	14	25	8	1	4	14	10	2	30	0	1	115	47	13	1	1	0	2	.325	.465	.790
15	Cubs	.247	October 2021	3	.667	2	1	93	12	23	4	0	3	12	12	1	23	3	1	106	36	7	0	0	0	4	.340	.387	.727
16	Rays	.246	October 2021	7	.429	3	4	256	36	63	14	1	13	35	23	1	78	8	1	280	118	28	0	0	1	4	.311	.461	.772
17	Orioles	.238	October 2021	3	.000	0	3	101	9	24	2	0	3	8	5	4	29	0	0	111	35	5	0	1	0	2	.297	.347	.644
18	Rangers	.235	October 2021	3	.333	1	2	98	13	23	2	0	5	13	8	0	17	0	1	106	40	7	0	0	0	2	.292	.408	.701
19	Mets	.235	October 2021	3	.333	1	2	98	9	23	4	2	3	9	7	0	25	1	1	106	40	9	1	0	1	5	.286	.408	.694
20	Phillies	.232	October 2021	3	.333	1	2	99	10	23	4	0	4	10	5	4	40	1	0	110	39	8	1	1	0	1	.294	.394	.688
21	Tigers	.232	October 2021	3	.333	1	2	99	10	23	4	2	1	10	10	0	31	9	0	111	34	7	0	2	0	3	.297	.343	.641
22	Cardinals	.226	October 2021	4	.250	1	3	124	12	28	3	1	4	10	15	4	31	7	1	145	45	8	2	0	1	3	.329	.363	.692
23	Marlins	.225	October 2021	3	.667	2	1	89	8	20	1	1	2	7	9	1	24	1	0	99	29	4	0	0	0	6	.303	.326	.629
24	Angels	.224	October 2021	3	.667	2	1	98	13	22	4	1	4	13	12	1	28	3	0	114	40	9	2	1	3	2	.313	.408	.721
25	Mariners	.224	October 2021	3	.333	1	2	98	10	22	7	1	1	10	12	3	26	1	0	114	34	9	1	0	1	2	.327	.347	.674