The Philadelphia Phillies and the Detroit Tigers were tied for the most runs in a game in 1920, with 21 runs.

Interpreted as:

most runs by a team in a regular-season game in 1920

	TEAM	R	DATE	TM		OPP	RESULT	AB	H	2B	3B	HR	RBI	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	AVG	OBP	SLG	OPS
1	Phillies	21	9/14/1920	PHN	vs	CIN	W 21-10	44	17	8	0	1	13	3	0	2	2	0	50	28	9	3	.386	.426	.636	1.062
2	Tigers	21	7/25/1920	DET	vs	SLA	W 21-8	46	22	2	3	0	20	6	0	2	1	0	52	30	5	0	.478	.538	.652	1.191
3	Yankees	20	7/17/1920	NYY	vs	CWS	W 20-5	46	22	7	2	3	17	0	0	0	0	0	48	42	12	2	.478	.478	.913	1.391
4	Yankees	19	7/30/1920	NYY	@	SLA	W 19-3	47	21	3	4	2	18	3	0	2	0	0	53	38	9	3	.447	.480	.809	1.289
5	Senators	19	7/27/1920	WSH	@	CLE	W 19-6	48	22	2	0	0	16	7	0	7	3	0	56	24	2	1	.458	.527	.500	1.027
6	Browns	18	9/15/1920	SLA	vs	BSA	W 18-5	43	22	6	0	1	17	5	0	1	3	0	51	31	7	3	.512	.563	.721	1.283
7	Cardinals	18	8/11/1920	SLN	@	PHN	W 18-9	48	25	7	0	1	17	4	2	4	1	0	56	35	8	2	.521	.574	.729	1.303
8	Giants	18	6/28/1920	NYG	@	PHN	W 18-3	42	20	3	1	3	18	7	0	6	1	2	50	34	7	1	.476	.551	.810	1.361
9	Browns	17	9/17/1920	SLA	vs	PHA	W 17-8	43	24	4	2	0	17	6	0	1	2	2	49	32	6	0	.558	.612	.744	1.356
10	Browns	17	9/11/1920	SLA	vs	WSH	W 17-2	44	21	7	1	2	17	4	1	4	2	0	50	36	10	1	.477	.531	.818	1.349
11	Yankees	17	7/6/1920	NYY	@	WSH	W 17-0	43	16	4	0	1	14	8	1	3	0	1	55	23	5	3	.372	.481	.535	1.016
12	Giants	17	5/19/1920	NYG	@	CHC	W 17-2	43	17	5	0	0	14	4	0	2	3	1	48	22	5	1	.395	.447	.512	.958
13	Senators	17	5/18/1920	WSH	vs	SLA	W 17-8	43	23	6	3	1	16	5	1	5	4	1	52	38	10	3	.535	.592	.884	1.476
14	Browns	16	10/3/1920	SLA	vs	CWS	W 16-7	39	18	3	2	0	15	6	1	2	7	1	47	25	5	1	.462	.543	.641	1.185
15	Cardinals	16	9/27/1920	SLN	@	CHC	W 16-1	47	25	7	0	1	15	1	0	2	2	1	50	35	8	2	.532	.542	.745	1.286
16	Tigers	16	9/24/1920	DET	vs	SLA	W 16-8	43	18	5	2	1	11	3	0	0	3	0	47	30	8	1	.419	.457	.698	1.154
17	White Sox	16	8/26/1920	CWS	@	NYY	W 16-4	41	17	6	1	0	15	5	0	3	3	0	48	25	7	2	.415	.478	.610	1.088
18	Cardinals	16	5/27/1920	SLN	vs	CIN	W 16-9	33	14	1	3	1	13	6	1	3	4	1	46	24	5	6	.424	.525	.727	1.252
19	White Sox	15	9/18/1920	CWS	vs	NYY	W 15-9	45	22	6	1	0	11	3	0	7	1	0	49	30	7	1	.489	.521	.667	1.188
20	White Sox	15	9/13/1920	CWS	vs	WSH	W 15-6	36	17	2	0	1	15	9	1	1	3	2	49	22	3	3	.472	.587	.611	1.198
21	Robins	15	9/11/1920	BKN	vs	SLN	W 15-4	40	20	5	1	1	11	1	0	0	0	0	44	30	7	3	.500	.512	.750	1.262
22	Indians	15	8/27/1920	CLE	@	PHA	W 15-3	46	21	4	0	0	10	7	0	2	0	1	54	25	4	1	.457	.528	.543	1.072
23	Browns	15	6/12/1920	SLA	vs	BSA	W 15-4	44	22	6	2	0	14	3	0	2	2	0	48	32	8	1	.500	.532	.727	1.259
24	Browns	15	6/10/1920	SLA	vs	WSH	W 15-1	39	17	2	1	1	13	5	0	1	4	0	46	24	4	2	.436	.500	.615	1.115
25	Cubs	15	5/22/1920	CHC	vs	PHN	W 15-8	37	16	4	0	0	14	8	1	2	2	3	48	20	4	2	.432	.543	.541	1.084