Stuffy McInnis had the most at-bats for the Red Sox in 1921, with 584 at-bats.

	NAME	AB	SEASON	TM	G	R	H	2B	3B	HR	RBI	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	AVG	OBP	SLG	OPS	WRC	WRAA	WOBA	WRC+	BRAA
1	Stuffy McInnis S. McInnis	584	1921	BSA	152	72	179	31	10	0	76	21	4	9	2	4	644	230	41	35	.307	.335	.394	.729	74	-6.2	.336	86	-12.3
2	Everett Scott E. Scott	576	1921	BSA	154	65	151	21	9	1	62	27	0	21	5	9	620	193	31	17	.262	.295	.335	.630	50	-27.6	.293	61	-33.5
3	Shano Collins S. Collins	542	1921	BSA	141	63	155	29	12	4	69	18	4	38	15	8	584	220	45	20	.286	.314	.406	.720	64	-9.2	.328	82	-14.7
4	Del Pratt D. Pratt	521	1921	BSA	135	80	169	36	10	5	102	44	1	10	8	10	574	240	51	8	.324	.378	.461	.839	89	17	.384	115	11.6
5	Mike Menosky M. Menosky	477	1921	BSA	133	77	143	18	5	3	45	60	9	45	12	6	565	180	26	19	.300	.388	.377	.766	78	7.6	.364	103	2.2
6	Nemo Leibold N. Leibold	467	1921	BSA	123	88	143	26	6	0	31	41	1	27	13	7	525	181	32	16	.306	.363	.388	.751	67	1.5	.351	95	-3.5
7	Eddie Foster E. Foster	412	1921	BSA	120	51	117	18	6	0	35	57	0	15	13	7	485	147	24	16	.284	.371	.357	.728	60	-0.4	.347	93	-5
8	Muddy Ruel M. Ruel	358	1921	BSA	113	41	99	21	1	1	45	41	1	15	2	7	412	125	23	12	.277	.353	.349	.702	47	-4.7	.333	85	-8.6
9	Ossie Vitt O. Vitt	232	1921	BSA	78	29	44	11	1	0	13	45	0	13	1	2	290	57	12	13	.190	.321	.246	.567	22	-14.4	.286	57	-17.1
10	Roxy Walters R. Walters	169	1921	BSA	54	17	34	4	1	0	14	10	2	11	3	0	186	40	5	5	.201	.254	.237	.491	7	-16.6	.237	28	-18.4
11	Tim Hendryx T. Hendryx	137	1921	BSA	49	10	33	8	2	0	22	24	2	13	1	1	169	45	10	6	.241	.362	.328	.690	19	-1.7	.335	86	-3.3
12	Bullet Joe Bush B. Joe Bush	120	1921	BSA	50	19	39	5	4	0	17	3	0	14	2	0	126	52	9	3	.325	.341	.433	.775	16	0.5	.352	96	-0.7
13	Sad Sam Jones S. Sam Jones	100	1921	BSA	43	11	24	3	1	2	14	10	2	25	1	1	114	35	6	2	.240	.321	.350	.671	11	-2.8	.317	75	-3.9
14	Pinky Pittenger P. Pittenger	91	1921	BSA	40	6	18	1	0	0	5	4	0	13	3	2	98	19	1	3	.198	.232	.209	.440	1	-10.7	.212	14	-11.7
15	Herb Pennock H. Pennock	85	1921	BSA	32	9	18	8	0	1	11	6	1	10	0	0	96	29	9	4	.212	.272	.341	.613	7	-4.9	.284	56	-5.8
16	Sammy Vick S. Vick	77	1921	BSA	44	5	20	3	1	0	9	1	0	10	0	1	80	25	4	2	.260	.269	.325	.594	5	-4.9	.272	49	-5.6
17	Elmer Myers E. Myers	65	1921	BSA	30	7	14	1	0	0	5	1	0	6	0	0	67	15	1	1	.215	.227	.231	.458	1	-7.2	.215	15	-7.8
18	Benn Karr B. Karr	62	1921	BSA	43	7	16	2	0	0	9	3	0	16	1	0	69	18	2	4	.258	.292	.290	.583	5	-4	.276	51	-4.7
19	Allen Russell A. Russell	57	1921	BSA	40	2	7	0	0	0	0	2	0	19	0	0	59	7	0	0	.123	.153	.123	.275	-3	-10.1	.136	-31	-10.7
20	Ernie Neitzke E. Neitzke	25	1921	BSA	11	3	6	0	0	0	2	4	0	4	0	0	29	6	0	0	.240	.345	.240	.585	2	-1.2	.296	63	-1.5
21	Hank Thormahlen H. Thormahlen	23	1921	BSA	23	1	4	1	0	0	0	1	1	5	1	0	26	5	1	1	.174	.240	.217	.457	1	-2.6	.225	21	-2.8
22	Jack Perrin J. Perrin	13	1921	BSA	4	3	3	0	0	0	1	0	0	3	0	0	13	3	0	0	.231	.231	.231	.462	0	-1.4	.216	16	-1.5
23	Curt Fullerton C. Fullerton	4	1921	BSA	4	0	0	0	0	0	0	1	0	0	0	0	5	0	0	0	.000	.200	.000	.200	0	-0.8	.149	-24	-0.9
24	Ed Chaplin E. Chaplin	2	1921	BSA	3	0	0	0	0	0	0	0	0	1	0	0	2	0	0	0	.000	.000	.000	.000	0	-0.6	.000	-111	-0.6
25	Allen Sothoron A. Sothoron	2	1921	BSA	2	0	1	1	0	0	0	0	0	1	0	0	2	2	1	0	.500	.500	1.000	1.500	1	0.5	.652	272	0.5