Frankie Frisch had the most stolen bases in 1921, with 49 steals.

Interpreted as:

1921 most steals by a player

	NAME	SB	SEASON	TM	G	AB	R	H	2B	3B	HR	RBI	BB	HBP	SO	CS	PA	TB	XBH	SH	AVG	OBP	SLG	OPS	WRC	WRAA	WOBA	WRC+	BRAA
1	Frankie Frisch F. Frisch	49	1921	NYG	153	618	121	211	31	17	8	100	42	1	28	13	687	300	56	26	.341	.384	.485	.870	113	26.9	.396	130	26.3
2	Max Carey M. Carey	37	1921	PIT	140	521	85	161	34	4	7	56	70	4	30	12	625	224	45	30	.309	.395	.430	.825	97	18.9	.385	122	17.5
3	George Sisler G. Sisler	35	1921	SLA	138	582	125	216	38	18	12	104	34	5	27	11	635	326	68	14	.371	.411	.560	.971	125	46	.437	140	35.3
4	Bucky Harris B. Harris	29	1921	WSH	154	584	82	169	22	8	0	54	54	18	39	9	683	207	30	27	.289	.367	.354	.722	83	-1.9	.344	92	-7.5
5	Jimmy Johnston J. Johnston	28	1921	BKN	152	624	104	203	41	14	5	56	45	1	26	16	689	287	60	19	.325	.372	.460	.832	104	18.1	.380	120	17.5
6	Sam Bohne S. Bohne	26	1921	CIN	153	613	98	175	28	16	3	44	54	4	38	22	691	244	47	20	.285	.347	.398	.745	85	-1.2	.346	101	0.8
7	Sam Rice S. Rice	26	1921	WSH	143	561	83	185	39	13	4	79	38	9	10	12	630	262	56	22	.330	.382	.467	.849	100	20.9	.389	118	15.7
8	Rabbit Maranville R. Maranville	25	1921	PIT	153	612	90	180	25	12	1	70	47	3	38	12	685	232	38	23	.294	.347	.379	.727	81	-4.9	.339	93	-6.3
9	Ty Cobb T. Cobb	22	1921	DET	128	507	124	197	37	16	12	101	56	3	19	15	581	302	65	15	.389	.452	.596	1.048	131	58.2	.471	164	51.2
10	Heinie Groh H. Groh	22	1921	CIN	97	357	54	118	19	6	0	48	36	4	17	14	416	149	25	19	.331	.398	.417	.815	63	11.4	.381	124	12.6
11	Ernie Johnson E. Johnson	22	1921	CWS	142	613	93	181	28	7	1	51	29	1	24	13	664	226	36	21	.295	.328	.369	.697	70	-13.1	.323	77	-21
12	Billy Southworth B. Southworth	22	1921	BSN	141	569	86	175	25	15	7	79	36	2	13	20	642	251	47	35	.308	.351	.441	.792	88	7.4	.362	110	8.4
13	Carson Bigbee C. Bigbee	21	1921	PIT	147	632	100	204	23	17	3	42	41	0	19	20	684	270	43	11	.323	.364	.427	.791	94	9.1	.364	109	7.7
14	Joe Judge J. Judge	21	1921	WSH	153	622	87	187	26	11	7	72	68	3	35	6	715	256	44	22	.301	.372	.412	.784	99	10.1	.365	104	4.2
15	Ross Youngs R. Youngs	21	1921	NYG	141	504	90	165	24	16	3	102	71	1	47	17	594	230	43	18	.327	.411	.456	.868	100	26	.402	134	25.5
16	Tony Boeckel T. Boeckel	20	1921	BSN	153	592	93	185	20	13	10	84	52	2	41	15	663	261	43	17	.313	.370	.441	.811	96	13.7	.373	118	14.8
17	Jack Fournier J. Fournier	20	1921	SLN	149	574	103	197	27	9	16	86	56	8	48	22	661	290	52	23	.343	.409	.505	.914	120	37.6	.418	145	37.8
18	Ken Williams K. Williams	20	1921	SLA	146	547	115	190	31	7	24	117	74	4	42	17	646	307	62	21	.347	.429	.561	.990	133	52.1	.447	146	41.1
19	George Burns G. Burns	19	1921	NYG	149	605	111	181	28	9	4	61	80	6	24	20	698	239	41	7	.299	.386	.395	.781	99	11.7	.368	113	11.1
20	Edd Roush E. Roush	19	1921	CIN	112	418	68	147	27	12	4	71	31	5	8	17	463	210	43	9	.352	.403	.502	.905	82	24.4	.413	144	25.7
21	Dave Bancroft D. Bancroft	17	1921	NYG	153	606	121	193	26	15	6	67	66	4	23	10	698	267	47	22	.318	.389	.441	.830	108	20.5	.384	122	19.9
22	Max Flack M. Flack	17	1921	CHC	133	572	80	172	31	4	6	37	32	4	15	11	615	229	41	7	.301	.342	.400	.742	75	-2.1	.343	96	-3.4
23	George Maisel G. Maisel	17	1921	CHC	111	393	54	122	7	2	0	43	11	3	13	7	427	133	9	20	.310	.334	.338	.673	42	-11	.316	78	-11.9
24	Bob Meusel B. Meusel	17	1921	NYY	149	598	104	190	40	16	24	138	34	2	88	6	646	334	80	12	.318	.356	.559	.915	112	30.9	.407	125	22.4
25	Wally Pipp W. Pipp	17	1921	NYY	153	588	96	174	35	9	8	103	45	1	28	10	667	251	52	33	.296	.347	.427	.774	87	4.1	.355	95	-4.7