The Boston Red Sox have a 60-55 record on May 21 all-time.

	TEAM	DATE	REC	TM		OPP	RESULT	W%	AB	R	H	2B	3B	HR	RBI	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	SF	IBB	GIDP	AVG	OBP	SLG	OPS
1	Americans	5/21/1902	0-1	BSA	vs	CWS	L 1-2	.000	28	1	4	1	1	0	1	0	1	6	0	-10	29	7	2	0		-10	-10	.143	.172	.250	.422
2	Americans	5/21/1904	0-1	BSA	vs	SLA	L 3-5	.000	45	3	8	2	1	0	3	3	0	9	1		48	12	3	0				.178	.229	.267	.496
3	Americans	5/21/1905	1-0	BSA	@	SLA	W 3-2	1.000	29	3	4	0	0	1	2	7	0	2	0		38	7	1	2				.138	.306	.241	.547
4	Americans	5/21/1906	0-1	BSA	vs	DET	L 1-2	.000	33	1	6	1	0	0	1	0	1		0		34	7	1	0				.182	.206	.212	.418
5	Americans	5/21/1907	0-1	BSA	@	CWS	L 1-3	.000	31	1	8	0	0	0	0	1	0	1	0		32	8	0	0				.258	.281	.258	.539
6	Red Sox	5/21/1909	1-0	BOS	@	CWS	W 6-3	1.000	35	6	8	2	0	0	5	2	0	7	6		39	10	2	2				.229	.270	.286	.556
7	Red Sox	5/21/1912	1-0	BSA	vs	CLE	W 3-1	1.000	28	3	4	1	0	0	3	2	1		2		31	5	1	0				.143	.226	.179	.404
8	Red Sox	5/21/1913	1-0	BSA	@	CWS	W 10-9	1.000	37	10	11	2	2	0	9	9	0	5	1		48	17	4	2				.297	.435	.459	.894
9	Red Sox	5/21/1914	0-1	BSA	vs	CWS	L 2-5	.000	30	2	7	1	1	0	0	2	0	2	0		32	10	2	0				.233	.281	.333	.615
10	Red Sox	5/21/1915	0-1	BSA	@	CWS	L 2-3	.000	66	2	13	1	1	0	2	3	0	11	0		69	16	2	0				.197	.232	.242	.474
11	Red Sox	5/21/1918	0-1	BSA	vs	CLE	L 5-6	.000	34	5	8	2	0	0	5	5	0	1	0		39	10	2	0				.235	.333	.294	.627
12	Red Sox	5/21/1919	0-1	BSA	@	DET	L 5-6	.000	32	5	7	0	1	0	3	1	0	1	0		34	9	1	1				.219	.242	.281	.524
13	Red Sox	5/21/1920	1-0	BSA	vs	DET	W 8-3	1.000	34	8	13	2	2	0	8	2	0	6	0	1	38	19	4	2				.382	.417	.559	.975
14	Red Sox	5/21/1921	0-1	BSA	@	DET	L 5-6	.000	39	5	14	4	0	0	5	3	0	1	0	2	43	18	4	1				.359	.405	.462	.866
15	Red Sox	5/21/1924	1-0	BSA	vs	DET	W 5-4	1.000	29	5	7	1	2	0	4	3	0	3	1	0	34	12	3	2				.241	.313	.414	.726
16	Red Sox	5/21/1925	1-0	BSA	@	CWS	W 9-7	1.000	38	9	12	2	0	0	9	5	1	7	0	0	45	14	2	1				.316	.409	.368	.778
17	Red Sox	5/21/1926	1-0	BSA	vs	CWS	W 8-7	1.000	37	8	12	6	1	0	6	3	1	5	0	0	42	20	7	1				.324	.390	.541	.931
18	Red Sox	5/21/1927	0-1	BSA	@	SLA	L 4-7	.000	37	4	10	1	0	2	4	1	0	3	0	0	38	17	3	0				.270	.289	.459	.749
19	Red Sox	5/21/1928	1-0	BSA	@	NYY	W 8-4	1.000	33	8	6	1	0	2	8	5	0	5	1	1	39	13	3	1				.182	.289	.394	.683
20	Red Sox	5/21/1928	0-1	BSA	@	NYY	L 2-3	.000	34	2	8	2	0	1	2	0	0	3	0	0	35	13	3	1				.235	.235	.382	.618
21	Red Sox	5/21/1930	0-1	BSA	@	WSH	L 2-10	.000	32	2	7	1	0	0	2	1	0	5	0	0	35	8	1	2				.219	.242	.250	.492
22	Red Sox	5/21/1930	0-1	BSA	@	WSH	L 1-6	.000	32	1	6	3	0	0	1	1	0	3	0	0	33	9	3	0				.188	.212	.281	.493
23	Red Sox	5/21/1931	0-1	BSA	@	SLA	L 1-2	.000	29	1	4	1	0	0	1	1	0	3	0	1	31	5	1	1				.138	.167	.172	.339
24	Red Sox	5/21/1932	0-1	BSA	@	PHA	L 6-18	.000	37	6	9	1	0	3	6	3	0	2	0	0	40	19	4	0				.243	.300	.514	.814
25	Red Sox	5/21/1932	0-1	BSA	@	PHA	L 3-6	.000	32	3	6	0	0	1	3	1	0	5	0	0	34	9	1	1				.188	.212	.281	.493
	Total		60-55					.522	3,995	593	1,080	190	35	106	551	431	28		70	22	4,524	1,658	331	48	22	18	79	.270	.344	.415	.759