The Oakland Athletics, the Los Angeles Dodgers and the Houston Astros were tied for pitching the most innings in a game in 2020, with 13 innings.

Interpreted as:

team most ip in one regular-season game, 2020

	TEAM	IP	DATE	TM		OPP	RESULT	ERA	SO	SHO	SV	H	ER	R	HR	BB	HBP	IBB	TBF	WP	K/9	BB/9	K/BB	HR/9	K%	BB%	WHIP	BABIP	RA	H/9
1	Athletics	13.0	8/7/2020	OAK	vs	HOU	W 3-2	0.69	9	0	0	7	1	2	0	4	0	0	50	1	6.23	2.77	2.25	0.00	18.0	8.0	0.85	.189	1.38	4.85
2	Dodgers	13.0	7/29/2020	LAD	@	HOU	W 4-2	0.69	13	0	0	8	1	2	0	7	0	1	52	0	9.00	4.85	1.86	0.00	25.0	13.5	1.15	.250	1.38	5.54
3	Astros	13.0	7/29/2020	HOU	vs	LAD	L 2-4	1.38	13	0	0	5	2	4	2	3	0	1	47	1	9.00	2.08	4.33	1.38	27.7	6.4	0.62	.103	2.77	3.46
4	Astros	12.2	8/7/2020	HOU	@	OAK	L 2-3	1.42	15	0	0	10	2	3	1	6	3	1	55	0	10.66	4.26	2.50	0.71	27.3	10.9	1.26	.300	2.13	7.11
5	Red Sox	12.0	9/18/2020	BOS	vs	NYY	L 5-6	3.00	13	0	0	11	4	6	1	3	1	0	47	0	9.75	2.25	4.33	0.75	27.7	6.4	1.17	.345	4.50	8.25
6	Yankees	12.0	9/18/2020	NYY	@	BOS	W 6-5	3.00	15	0	0	10	4	5	1	5	0	1	53	2	11.25	3.75	3.00	0.75	28.3	9.4	1.25	.281	3.75	7.50
7	Nationals	12.0	9/11/2020	WSH	vs	ATL	W 8-7	5.25	9	0	0	14	7	7	1	12	1	1	62	0	6.75	9.00	0.75	0.75	14.5	19.4	2.17	.333	5.25	10.50
8	Cardinals	12.0	8/29/2020	STL	vs	CLE	L 1-2	0.75	12	0	0	5	1	2	1	6	1	0	45	1	9.00	4.50	2.00	0.75	26.7	13.3	0.92	.160	1.50	3.75
9	Indians	12.0	8/29/2020	CLE	@	STL	W 2-1	0.75	11	0	1	4	1	1	0	5	1	2	43	1	8.25	3.75	2.20	0.00	25.6	11.6	0.75	.154	0.75	3.00
10	Twins	12.0	8/18/2020	MIN	vs	MIL	W 4-3	1.50	15	0	0	4	2	3	0	4	0	0	44	0	11.25	3.00	3.75	0.00	34.1	9.1	0.67	.160	2.25	3.00
11	Braves	11.2	9/11/2020	ATL	@	WSH	L 7-8	5.40	9	0	0	11	7	8	2	5	0	2	50	0	6.94	3.86	1.80	1.54	18.0	10.0	1.37	.265	6.17	8.49
12	Brewers	11.1	8/18/2020	MIL	@	MIN	L 3-4	2.38	11	0	0	5	3	4	0	7	1	0	47	2	8.74	5.56	1.57	0.00	23.4	14.9	1.06	.179	3.18	3.97
13	Braves	11.0	9/25/2020	ATL	vs	BOS	W 8-7	4.09	7	0	0	7	5	7	1	7	0	2	47	0	5.73	5.73	1.00	0.82	14.9	14.9	1.27	.188	5.73	5.73
14	Giants	11.0	9/24/2020	SFG	vs	COL	L 4-5	3.27	16	0	0	13	4	5	0	2	1	0	48	0	13.09	1.64	8.00	0.00	33.3	4.2	1.36	.448	4.09	10.64
15	Rockies	11.0	9/24/2020	COL	@	SFG	W 5-4	3.27	8	0	1	10	4	4	1	5	0	2	46	2	6.55	4.09	1.60	0.82	17.4	10.9	1.36	.281	3.27	8.18
16	Padres	11.0	9/20/2020	SDP	@	SEA	W 7-4	2.45	18	0	0	5	3	4	1	5	0	0	42	2	14.73	4.09	3.60	0.82	42.9	11.9	0.91	.222	3.27	4.09
17	Mariners	11.0	9/20/2020	SEA	vs	SDP	L 4-7	3.27	9	0	0	6	4	7	1	7	1	0	47	0	7.36	5.73	1.29	0.82	19.1	14.9	1.18	.172	5.73	4.91
18	Angels	11.0	9/12/2020	LAA	@	COL	W 5-2	1.64	8	0	1	6	2	2	0	3	1	1	43	1	6.55	2.45	2.67	0.00	18.6	7.0	0.82	.194	1.64	4.91
19	Rockies	11.0	9/12/2020	COL	vs	LAA	L 2-5	3.27	10	0	0	8	4	5	1	4	1	0	48	0	8.18	3.27	2.50	0.82	20.8	8.3	1.09	.219	4.09	6.55
20	Angels	11.0	9/4/2020	LAA	vs	HOU	W 6-5	4.09	13	0	0	13	5	5	0	1	1	0	48	0	10.64	0.82	13.00	0.00	27.1	2.1	1.27	.394	4.09	10.64
21	Cubs	11.0	9/1/2020	CHC	@	PIT	W 8-7	4.91	9	0	0	10	6	7	1	7	0	2	50	0	7.36	5.73	1.29	0.82	18.0	14.0	1.55	.273	5.73	8.18
22	Pirates	11.0	9/1/2020	PIT	vs	CHC	L 7-8	4.09	6	0	0	13	5	8	2	4	0	0	49	1	4.91	3.27	1.50	1.64	12.2	8.2	1.55	.297	6.55	10.64
23	Orioles	11.0	8/31/2020	BAL	@	TOR	W 4-3	0.00	12	0	0	7	0	3	0	4	0	0	42	0	9.82	3.27	3.00	0.00	28.6	9.5	1.00	.269	2.45	5.73
24	Blue Jays	11.0	8/31/2020	TOR	vs	BAL	L 3-4	2.45	14	0	0	10	3	4	0	1	0	0	43	0	11.45	0.82	14.00	0.00	32.6	2.3	1.00	.357	3.27	8.18
25	Phillies	11.0	8/28/2020	PHI	vs	ATL	W 7-4	2.45	8	0	0	10	3	4	2	5	0	0	45	0	6.55	4.09	1.60	1.64	17.8	11.1	1.36	.267	3.27	8.18