Jimmie Foxx had his most RBIs in a month in August 1933, with 40 RBIs.

	NAME	RBI	MONTH	G	AB	R	H	2B	3B	HR	BB	HBP	SO	SB	PA	TB	XBH	SH	GIDP	AVG	OBP	SLG	OPS
1	Jimmie Foxx J. Foxx	40	August 1933	28	120	17	41	8	3	7	17	0	18	0	137	76	18	0		.342	.423	.633	1.057
2	Jimmie Foxx J. Foxx	38	July 1932	33	130	35	40	13	1	12	26	0	22	1	156	91	26	0		.308	.423	.700	1.123
3	Jimmie Foxx J. Foxx	38	May 1930	29	106	29	38	6	3	11	22	0	11	1	131	83	20	3		.358	.469	.783	1.252
4	Jimmie Foxx J. Foxx	37	May 1932	27	98	32	42	4	1	13	18	0	13	0	116	87	18	0		.429	.517	.888	1.405
5	Jimmie Foxx J. Foxx	36	September 1938	29	113	30	39	5	2	10	22	0	12	0	136	78	17	1		.345	.452	.690	1.142
6	Jimmie Foxx J. Foxx	35	August 1940	32	113	34	39	7	0	13	27	0	21	0	141	85	20	1	2	.345	.471	.752	1.224
7	Jimmie Foxx J. Foxx	35	May 1938	25	96	24	33	4	2	10	18	0	14	2	114	71	16	0		.344	.447	.740	1.187
8	Jimmie Foxx J. Foxx	35	June 1932	29	113	28	39	3	2	12	24	0	22	1	137	82	17	0		.345	.460	.726	1.186
9	Jimmie Foxx J. Foxx	35	June 1930	30	105	30	39	4	2	11	16	0	13	2	125	80	17	4		.371	.455	.762	1.216
10	Jimmie Foxx J. Foxx	33	June 1938	26	95	27	35	4	1	11	21	0	16	1	116	74	16	0		.368	.483	.779	1.262
11	Jimmie Foxx J. Foxx	33	June 1936	26	102	27	40	5	1	9	13	0	19	3	115	74	15	0		.392	.461	.725	1.186
12	Jimmie Foxx J. Foxx	33	July 1929	33	110	30	37	2	1	9	27	0	18	0	141	68	12	4		.336	.467	.618	1.085
13	Jimmie Foxx J. Foxx	32	July 1939	33	124	43	47	6	3	13	28	0	21	1	154	98	22	2	7	.379	.493	.790	1.284
14	Jimmie Foxx J. Foxx	32	August 1935	34	138	21	42	8	3	10	9	0	31	2	147	86	21	0		.304	.347	.623	.970
15	Jimmie Foxx J. Foxx	32	June 1933	31	121	37	45	7	3	13	19	0	20	0	140	97	23	0		.372	.457	.802	1.259
16	Jimmie Foxx J. Foxx	31	May 1931	27	109	16	31	7	0	8	13	0	12	0	122	62	15	0		.284	.361	.569	.929
17	Jimmie Foxx J. Foxx	30	September 1933	26	93	24	33	4	1	12	18	0	14	1	111	75	17	0		.355	.459	.806	1.266
18	Jimmie Foxx J. Foxx	29	August 1938	33	126	26	39	7	1	9	25	0	17	0	151	75	17	0		.310	.424	.595	1.019
19	Jimmie Foxx J. Foxx	29	July 1930	32	121	30	40	9	3	7	23	0	15	3	147	76	19	3		.331	.438	.628	1.066
20	Jimmie Foxx J. Foxx	28	June 1937	26	96	22	25	4	0	7	19	0	13	3	115	50	11	0		.260	.383	.521	.903
21	Jimmie Foxx J. Foxx	28	September 1934	29	105	15	30	5	0	6	21	0	13	0	127	53	11	1		.286	.405	.505	.910
22	Jimmie Foxx J. Foxx	28	July 1933	29	111	21	43	7	2	9	17	1	18	0	129	81	18	0		.387	.473	.730	1.203
23	Jimmie Foxx J. Foxx	28	May 1929	27	106	23	49	4	4	7	11	1	12	3	121	82	15	3		.462	.517	.774	1.291
24	Jimmie Foxx J. Foxx	27	July 1937	30	117	25	36	5	3	11	18	0	25	2	136	80	19	1		.308	.400	.684	1.084
25	Jimmie Foxx J. Foxx	27	July 1936	30	121	27	38	7	1	8	18	0	26	3	139	71	16	0		.314	.403	.587	.990