The Chicago White Sox have the most games by a team in a week, with 13 games the week of August 22, 1938.

	TEAM	G	WEEK	W%	W	L	AB	R	H	2B	3B	HR	RBI	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	SF	IBB	GIDP	AVG	OBP	SLG	OPS
1	White Sox	13	8/22/1938 - 8/28/1938	.308	4	9	475	62	141	26	9	9	60	25	0	39	8		504	212	44	4				.297	.332	.446	.778
2	White Sox	12	7/19/1948 - 7/25/1948	.167	2	10	409	39	100	6	1	3	35	32	2	44	4		446	117	10	3			11	.244	.302	.286	.589
3	Athletics	12	8/22/1938 - 8/28/1938	.500	6	6	423	73	132	17	11	6	72	51	3	29	1		490	189	34	13				.312	.390	.447	.837
4	Senators	12	9/6/1937 - 9/12/1937	.583	7	5	418	56	111	21	2	5	49	54	1	54	6		479	151	28	6				.266	.351	.361	.712
5	Giants	12	9/12/1927 - 9/18/1927	.667	8	4	420	72	119	28	8	11	68	38	2	48	5		471	196	47	11				.283	.346	.467	.812
6	Pirates	12	9/6/1926 - 9/12/1926	.583	7	5	401	50	114	19	4	5	46	30	3	30	1		442	156	28	8				.284	.339	.389	.728
7	Robins	12	9/1/1924 - 9/7/1924	.833	10	2	436	73	135	28	6	6	71	48	0	27	1		491	193	40	7				.310	.378	.443	.821
8	Tigers	12	9/17/1923 - 9/23/1923	.455	5	6	425	71	120	24	1	3	63	58	6	27	4		506	155	28	17				.282	.376	.365	.741
9	Cardinals	12	9/1/1913 - 9/7/1913	.091	1	10	367	27	82	8	4	1		32	6	55	9		416	101	13	11				.223	.296	.275	.572
10	Browns	12	9/5/1910 - 9/11/1910	.333	4	8	363	38	68	6	5	0		36	0		11		413	84	11	14				.187	.261	.231	.492
11	Americans	12	8/21/1905 - 8/27/1905	.333	4	8	403	37	81	15	2	2		25	4		8		404	106	19	10				.201	.255	.263	.518
12	Tigers	12	9/5/1904 - 9/11/1904	.417	5	7	370	27	76	13	5	0	22	34	3		9		420	99	18	13				.205	.278	.268	.545
13	Browns	12	9/5/1904 - 9/11/1904	.500	6	6	385	36	85	8	0	0	26	29	4		9		427	93	8	9				.221	.282	.242	.524
14	Browns	12	10/3/1898 - 10/9/1898	.273	3	8		38
15	Mets	11	8/28/1967 - 9/3/1967	.364	4	7	360	20	67	6	1	6	19	19	0	53	4	3	382	93	13	1	2	2	10	.186	.226	.258	.484
16	Red Sox	11	7/4/1966 - 7/10/1966	.818	9	2	361	54	100	15	5	12	49	37	1	69	7	0	409	161	32	6	4	12	10	.277	.342	.446	.788
17	Yankees	11	7/4/1966 - 7/10/1966	.273	3	8	364	35	91	13	3	9	32	30	1	51	3	1	404	137	25	7	2	3	8	.250	.307	.376	.684
18	Red Sox	11	6/5/1961 - 6/11/1961	.600	6	4	374	57	99	18	5	9	54	51	1	58	5	0	433	154	32	4	3	3	8	.265	.352	.412	.764
19	Angels	11	6/5/1961 - 6/11/1961	.500	5	5	376	43	84	17	2	12	41	40	4	68	2	2	422	141	31	1	1	0	9	.223	.304	.375	.679
20	Phillies	11	7/18/1955 - 7/24/1955	.909	10	1	335	53	93	16	3	11	51	39	2	47	3	2	382	148	30	3	3	3	9	.278	.354	.442	.795
21	Braves	11	9/25/1950 - 10/1/1950	.273	3	8	378	54	94	19	4	7	47	36	0	49	2		424	142	30	10			7	.249	.314	.376	.690
22	Dodgers	11	9/25/1950 - 10/1/1950	.636	7	4	365	57	102	17	2	13	52	37	1	23	5		408	162	32	5			8	.279	.347	.444	.791
23	Senators	11	8/18/1947 - 8/24/1947	.364	4	7	403	39	108	14	2	5	37	32	0	37	2		441	141	21	6			8	.268	.322	.350	.672
24	Tigers	11	9/10/1945 - 9/16/1945	.636	7	4	383	42	99	12	6	3	38	31	0	41	1		426	132	21	12			9	.258	.314	.345	.659
25	White Sox	11	9/3/1945 - 9/9/1945	.273	3	8	394	49	105	19	5	5	47	43	1	47	9		443	149	29	5			8	.266	.340	.378	.718