The Boston Americans pitched their most innings in a game versus the Philadelphia Athletics on September 1, 1906, with 24 innings.

Interpreted as:

most ip in a regular-season game as a boston bee

	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	Americans	24.0	9/1/1906	BSA	vs	PHA	L 1-4	0.00	14	0	0	16	0	4	0	2	1		87	0	5.25	0.75	7.00	0.00	16.1	2.3	0.75	.229	1.50	6.00
2	Red Sox	20.0	9/3/1981	BOS	vs	SEA	L 7-8	3.15	15	0	0	24	7	8	0	8	1	2	90	2	6.75	3.60	1.88	0.00	16.7	8.9	1.60	.364	3.60	10.80
3	Red Sox	20.0	7/27/1969	BOS	@	SEA	W 5-3	1.35	18	0	0	13	3	3	1	11	1	0	84	0	8.10	4.95	1.64	0.45	21.4	13.1	1.20	.226	1.35	5.85
4	Americans	20.0	7/4/1905	BSA	vs	PHA	L 2-4	0.00	9	0	0	12	0	4	1	0	1		75	0	4.05	0.00		0.45	12.0	0.0	0.60	.172	1.80	5.40
5	Red Sox	19.1	8/29/1967	BOS	@	NYY	L 3-4	1.86	10	0	0	17	4	4	1	8	2	3	82	0	4.66	3.72	1.25	0.47	12.2	9.8	1.29	.262	1.86	7.91
6	Red Sox	19.0	9/5/2017	BOS	vs	TOR	W 3-2	0.95	23	0	0	12	2	2	1	4	0	0	71	0	10.89	1.89	5.75	0.47	32.4	5.6	0.84	.256	0.95	5.68
7	Red Sox	19.0	4/10/2015	BOS	@	NYY	W 6-5	2.37	13	0	0	14	5	5	2	6	1	1	75	0	6.16	2.84	2.17	0.95	17.3	8.0	1.05	.226	2.37	6.63
8	Red Sox	19.0	4/11/1992	BOS	@	CLE	W 7-5	2.37	17	0	0	20	5	5	0	7	1	2	80	0	8.05	3.32	2.43	0.00	21.3	8.8	1.42	.364	2.37	9.47
9	Red Sox	18.1	7/9/2006	BOS	@	CWS	L 5-6	2.95	16	0	0	18	6	6	2	4	0	1	74	0	7.85	1.96	4.00	0.98	21.6	5.4	1.20	.308	2.95	8.84
10	Red Sox	18.1	7/13/1951	BSA	@	CWS	L 4-5	2.45	10	0	0	13	5	5	0	9	0	0	77	1	4.91	4.42	1.11	0.00	13.0	11.7	1.20	.224	2.45	6.38
11	Red Sox	18.0	8/9/2014	BOS	@	LAA	L 4-5	2.50	14	0	0	15	5	5	2	7	0	4	75	2	7.00	3.50	2.00	1.00	18.7	9.3	1.22	.250	2.50	7.50
12	Red Sox	18.0	6/5/2001	BOS	vs	DET	W 4-3	1.50	15	0	0	15	3	3	1	8	1	2	76	2	7.50	4.00	1.88	0.50	19.7	10.5	1.28	.275	1.50	7.50
13	Red Sox	18.0	8/1/2000	BOS	@	SEA	L 4-5	2.50	16	0	0	12	5	5	2	4	0	0	68	0	8.00	2.00	4.00	1.00	23.5	5.9	0.89	.217	2.50	6.00
14	Red Sox	18.0	9/5/1927	BSA	vs	NYY	W 12-11	0.00	12	0	0	21	0	11	1	14	0		88	0	6.00	7.00	0.86	0.50	13.6	15.9	1.94	.328	5.50	10.50
15	Red Sox	17.2	8/25/2001	BOS	@	TEX	L 7-8	3.57	13	0	0	13	7	8	3	9	3	2	77	2	6.62	4.58	1.44	1.53	16.9	11.7	1.25	.204	4.08	6.62
16	Red Sox	17.2	8/25/1968	BOS	@	BAL	L 2-3	1.53	17	0	0	13	3	3	0	12	1	3	77	1	8.66	6.11	1.42	0.00	22.1	15.6	1.42	.277	1.53	6.62
17	Red Sox	17.2	4/16/1967	BOS	@	NYY	L 6-7	3.06	13	0	0	15	6	7	0	9	1	0	76	2	6.62	4.58	1.44	0.00	17.1	11.8	1.36	.283	3.57	7.64
18	Red Sox	17.0	5/6/2012	BOS	vs	BAL	L 6-9	4.24	15	0	0	15	8	9	4	10	0	0	69	0	7.94	5.29	1.50	2.12	21.7	14.5	1.47	.275	4.76	7.94
19	Red Sox	17.0	10/4/1980	BOS	vs	TOR	L 6-7	3.18	3	0	0	17	6	7	3	4	1	2	73	0	1.59	2.12	0.75	1.59	4.1	5.5	1.24	.226	3.71	9.00
20	Red Sox	17.0	8/2/1978	BOS	@	NYY	W 7-5	1.59	15	0	0	12	3	5	0	5	0	1	68	0	7.94	2.65	3.00	0.00	22.1	7.4	1.00	.250	2.65	6.35
21	Red Sox	17.0	7/12/1951	BSA	@	CWS	W 5-4	2.12	9	0	0	11	4	4	0	8	2	0	71	0	4.76	4.24	1.13	0.00	12.7	11.3	1.12	.212	2.12	5.82
22	Red Sox	17.0	7/14/1916	BSA	vs	SLA	N 0-0	0.00	9	0	0	10	0	0	0	9	0		64	1	4.76	4.76	1.00	0.00	14.1	14.1	1.12	.217	0.00	5.29
23	Americans	17.0	7/9/1902	BSA	vs	PHA	L 2-4	0.00	5	0	0	11	0	4	1	5	0	-9	65	0	2.65	2.65	1.00	0.53	7.7	7.7	0.94	.185	2.12	5.82
24	Red Sox	16.2	9/14/1952	BSA	@	CWS	L 3-4	2.16	2	0	0	17	4	4	0	9	0	3	71	0	1.08	4.86	0.22	0.00	2.8	12.7	1.56	.283	2.16	9.18
25	Red Sox	16.1	6/18/2019	BOS	@	MIN	L 3-4	2.20	16	0	0	15	4	4	1	5	2	1	69	1	8.82	2.76	3.20	0.55	23.2	7.2	1.22	.311	2.20	8.27