The Pittsburgh Pirates had their most RBIs in a game against the Cubs on September 16, 1975, with 21 RBIs.

Interpreted as:

jack wilson pirates most rbis in a regular-season game

	TEAM	RBI	DATE	TM		OPP	RESULT	AB	R	H	2B	3B	HR	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	SF	IBB	GIDP	AVG	OBP	SLG	OPS
1	Pirates	21	9/16/1975	PIT	@	CHC	W 22-0	53	22	24	2	1	2	6	1	5	0	0	61	34	5	0	1	0	0	.453	.508	.642	1.150
2	Pirates	20	6/22/1925	PIT	@	SLN	W 24-6	51	24	21	4	0	6	7	1	0	2	0	60	43	10	1				.412	.492	.843	1.335
3	Pirates	20	4/27/1912	PIT	vs	CIN	W 23-4	43	23	27	5	3	0	5	0	1	8		51	38	8	3				.628	.667	.884	1.550
4	Pirates	19	8/3/1961	PIT	@	STL	W 19-0	50	19	24	7	0	3	5	0	4	0	0	55	40	10	0	0	1	1	.480	.527	.800	1.327
5	Pirates	19	6/14/1930	PIT	@	PHN	W 19-12	40	19	21	7	1	0	7	0	2	1	0	51	30	8	4				.525	.596	.750	1.346
6	Pirates	19	6/20/1925	PIT	vs	BKN	W 21-5	47	21	25	3	3	4	5	1	0	0	1	54	46	10	1				.532	.585	.979	1.564
7	Pirates	18	7/1/2019	PIT	vs	CHC	W 18-5	46	18	23	7	0	5	3	1	7	1	0	50	45	12	0	0	0	1	.500	.540	.978	1.518
8	Pirates	18	6/11/2005	PIT	vs	TBD	W 18-2	46	18	20	3	1	1	4	1	8	0	0	52	28	5	0	1	0	0	.435	.481	.609	1.089
9	Pirates	18	9/26/1992	PIT	vs	NYM	W 19-2	43	19	20	5	2	3	8	0	4	1	0	51	38	10	0	0	1	1	.465	.549	.884	1.433
10	Pirates	18	8/1/1970	PIT	@	ATL	W 20-10	47	20	22	7	3	4	6	1	6	0	0	54	47	14	0	0	1	1	.468	.537	1.000	1.537
11	Pirates	18	8/21/1968	PIT	@	CIN	W 19-1	47	19	23	3	1	3	6	0	10	2	0	54	37	7	1	0	0	1	.489	.547	.787	1.334
12	Pirates	18	8/6/1959	PIT	@	STL	W 18-2	48	18	23	5	0	2	5	0	2	0	0	53	34	7	0	0	0	1	.479	.528	.708	1.237
13	Pirates	18	6/6/1943	PIT	vs	NYG	W 18-1	39	18	18	2	4	1	7	0	3	0	0	47	31	7	1			0	.462	.543	.795	1.338
14	Pirates	18	5/2/1925	PIT	vs	CIN	W 18-3	39	18	15	4	3	2	8	0	4	1	0	48	31	9	1				.385	.489	.795	1.284
15	Pirates	18	7/7/1923	PIT	@	PHN	W 18-5	40	18	15	4	1	1	9	1	1	3	0	52	24	6	2				.375	.500	.600	1.100
16	Pirates	18	6/25/1912	PIT	@	SLN	W 19-3	47	19	22	2	1	1	5	0	1	0		53	29	4	1				.468	.519	.617	1.136
17	Pirates	17	8/24/2002	PIT	@	MIL	W 17-10	40	17	16	9	0	2	5	3	7	2	0	50	31	11	1	1	0	0	.400	.490	.775	1.265
18	Pirates	17	6/30/1962	PIT	@	STL	W 17-7	46	17	22	4	0	4	2	0	4	0	0	49	38	8	1	0	0	1	.478	.500	.826	1.326
19	Pirates	17	5/2/1954	PIT	@	CHC	W 18-10	39	18	18	7	1	2	7	0	7	2	1	48	33	10	1	1	0	0	.462	.532	.846	1.378
20	Pirates	17	5/26/1943	PIT	vs	BKN	W 17-4	37	17	16	2	1	2	11	0	2	0	0	50	26	5	2			1	.432	.563	.703	1.265
21	Pirates	17	7/21/1936	PIT	@	PHN	W 17-6	47	17	21	5	0	2	7	0	6	1	0	54	32	7	0			1	.447	.519	.681	1.199
22	Pirates	17	5/15/1935	PIT	@	PHN	W 20-5	50	20	19	3	0	3	5	0	3	0	0	55	31	6	0			0	.380	.436	.620	1.056
23	Pirates	17	8/2/1928	PIT	@	PHN	W 18-4	44	18	20	3	0	2	6	0	2	1	0	54	29	5	4				.455	.520	.659	1.179
24	Pirates	17	8/8/1922	PIT	@	PHN	W 19-8	52	19	27	4	0	3	2	1	3	1	0	55	40	7	0				.519	.545	.769	1.315
25	Pirates	17	8/7/1922	PIT	@	PHN	W 17-10	48	17	22	6	1	1	3	0	3	0	1	53	33	8	2				.458	.490	.688	1.178