Lloyd Waner has the most career singles by a 21-year-old player, with 198 singles.

Interpreted as:

most singles by a player by 21 year old

	NAME	1B	G	AB	R	H	2B	3B	HR	RBI	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	SF	IBB	GIDP	AVG	OBP	SLG	OPS
1	Lloyd Waner L. Waner	198	150	629	133	223	17	6	2	27	37	6	23	14		683	258	25	11				.355	.396	.410	.806
2	Buddy Lewis B. Lewis	158	162	697	115	212	31	9	14	97	62	2	40	19		771	303	54	10				.304	.363	.435	.797
3	Garry Templeton G. Templeton	155	153	621	94	200	19	18	8	79	15	1	70	28	24	644	279	45	2	5	3	9	.322	.336	.449	.786
4	Starlin Castro S. Castro	152	158	674	91	207	36	9	10	66	35	2	96	22	9	715	291	55	0	4	2	20	.307	.341	.432	.773
5	Edgar Renteria E. Renteria	152	155	629	93	182	21	3	6	50	48	4	113	28	15	698	227	30	12	5	1	13	.289	.341	.361	.702
6	Mike Caruso M. Caruso	151	136	562	83	174	14	5	4	54	17	7	36	23	8	599	210	23	9	4	0	6	.310	.336	.374	.709
7	Roberto Alomar R. Alomar	149	158	623	82	184	27	1	7	56	53	1	76	42	17	702	234	35	17	8	4	10	.295	.347	.376	.723
8	Alfredo Griffin A. Griffin	145	153	624	81	179	22	10	2	31	40	5	59	21	16	689	227	34	16	4	0	10	.287	.333	.364	.697
9	Rickey Henderson R. Henderson	144	158	591	111	179	22	4	9	53	117	5	54	100	26	722	236	35	6	3	7	6	.303	.420	.399	.820
10	Elvis Andrus E. Andrus	143	158	611	92	167	19	4	1	45	68	6	100	36	18	702	197	24	16	1	0	6	.273	.351	.322	.674
11	Rick Manning R. Manning	140	152	608	78	178	25	8	5	45	48	1	94	19	12	672	234	38	8	7	1	10	.293	.342	.385	.727
12	Stuffy McInnis S. McInnis	138	147	537	82	179	24	14	3		44	4		25		614	240	41	29				.333	.388	.447	.835
13	Delmon Young D. Young	137	163	652	66	189	39	0	13	83	26	5	127	9	5	690	267	52	0	7	2	21	.290	.319	.410	.728
14	Robin Yount R. Yount	134	158	626	67	177	35	4	4	46	40	2	85	17	7	682	232	43	11	3	1	8	.283	.326	.371	.697
15	Joe Vosmik J. Vosmik	132	149	591	80	189	36	14	7	117	38	2	30	7		640	274	57	9				.320	.363	.464	.827
16	Eddie Murphy E. Murphy	132	138	511	103	152	13	7	0		71	10	43	23		602	179	20	10				.297	.394	.350	.744
17	Richie Ashburn R. Ashburn	131	117	463	78	154	17	4	2	40	60	1	22	32		530	185	23	6			1	.333	.410	.400	.810
18	Rocco Baldelli R. Baldelli	130	152	621	87	180	32	7	11	76	29	8	125	25	10	667	259	50	3	6	3	10	.290	.327	.417	.744
19	Alex Rodriguez A. Rodriguez	129	149	625	122	209	47	3	30	100	53	5	94	29	4	691	352	80	3	5	2	15	.334	.388	.563	.951
20	Dick Bartell D. Bartell	129	143	610	101	184	40	13	2	57	40	2	29	11		674	256	55	22				.302	.347	.420	.766
21	Richard Hoblitzell R. Hoblitzell	129	155	611	85	170	24	13	4		47	2	32	28		678	232	41	18				.278	.332	.380	.712
22	Lou Whitaker L. Whitaker	128	151	533	81	154	12	9	5	64	69	2	69	7	8	630	199	26	16	10	0	11	.289	.366	.373	.740
23	Frank Robinson F. Robinson	128	148	611	96	189	30	5	26	69	41	13	90	11	1	673	307	61	4	4	5	16	.309	.363	.502	.866
24	Ty Cobb T. Cobb	128	150	582	88	188	36	20	4	107	30	6		39		633	276	60	15				.323	.362	.474	.837
25	Al Kaline A. Kaline	125	153	617	96	194	32	10	27	128	70	1	55	7	1	693	327	69	1	4	4	12	.314	.383	.530	.913