Mel Ott has the most career RBIs by a player younger than 27, with 963 RBIs.

Interpreted as:

most rbi before turning 27 years old by a player

	NAME	RBI	G	AB	R	H	2B	3B	HR	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	SF	IBB	GIDP	AVG	OBP	SLG	OPS
1	Mel Ott M. Ott	963	1,288	4,542	912	1,440	257	47	242	707	24	359	45		5,332	2,517	546	59				.317	.412	.554	.966
2	Jimmie Foxx J. Foxx	961	1,109	3,862	857	1,307	224	72	266	668	7	545	42		4,592	2,473	562	55				.338	.437	.640	1.077
3	Joe DiMaggio J. DiMaggio	815	825	3,368	735	1,163	214	69	198	337	22	160	21		3,738	2,109	481	11			33	.345	.408	.626	1.035
4	Alex Rodriguez A. Rodriguez	813	1,054	4,148	838	1,285	247	16	273	443	53	823	157	42	4,703	2,383	536	16	43	20	89	.310	.380	.574	.954
5	Hal Trosky Sr. H. Trosky Sr.	768	895	3,533	630	1,120	231	49	180	326	10	308	19		3,890	1,989	460	21			6	.317	.376	.563	.939
6	Mickey Mantle M. Mantle	766	1,102	3,937	889	1,238	185	50	249	797	7	778	76	24	4,768	2,270	484	11	16	48	37	.314	.429	.577	1.006
7	Miguel Cabrera M. Cabrera	764	1,051	3,963	637	1,235	255	12	211	454	33	829	24	15	4,491	2,147	478	5	36	90	127	.312	.384	.542	.926
8	Albert Pujols A. Pujols	758	933	3,489	748	1,159	260	12	250	493	48	394	36	17	4,062	2,193	522	1	31	98	114	.332	.419	.629	1.047
9	Joe Medwick J. Medwick	756	934	3,814	673	1,291	305	73	131	197	16	332	22		4,040	2,135	509	13				.338	.373	.560	.933
10	Johnny Bench J. Bench	745	1,094	4,065	612	1,096	197	17	212	451	11	643	29	26	4,587	1,963	426	5	55	83	111	.270	.340	.483	.823
11	Orlando Cepeda O. Cepeda	743	1,049	4,046	642	1,254	223	22	221	245	48	607	92	47	4,377	2,184	466	1	37	61	110	.310	.354	.540	.893
12	Hank Aaron H. Aaron	743	1,039	4,114	715	1,309	225	57	219	341	15	377	36	16	4,530	2,305	501	18	42	72	116	.318	.369	.560	.929
13	Ken Griffey Jr. K. Griffey Jr.	725	1,057	3,985	695	1,204	227	21	238	504	25	634	108	44	4,558	2,187	486	6	38	119	75	.302	.381	.549	.930
14	Lou Gehrig L. Gehrig	706	819	2,940	677	993	221	74	164	520	17	372	36		3,564	1,854	459	87				.338	.440	.631	1.071
15	Juan Soto J. Soto	697	1,096	3,857	775	1,086	199	16	244	896	19	833	95	27	4,801	2,049	459	3	26	80	101	.282	.417	.531	.948
16	Al Kaline A. Kaline	694	1,204	4,505	714	1,390	226	45	159	474	23	378	84	39	5,070	2,183	430	28	40	46	123	.309	.374	.485	.859
17	Frank Robinson F. Robinson	692	1,023	3,794	733	1,166	221	35	235	450	75	540	96	29	4,370	2,162	491	13	38	67	102	.307	.388	.570	.958
18	Andruw Jones A. Jones	684	1,152	4,170	687	1,118	219	25	224	440	44	879	118	43	4,696	2,059	468	6	36	31	94	.268	.342	.494	.835
19	Ruben Sierra R. Sierra	673	1,060	4,144	588	1,160	230	44	156	298	7	597	88	33	4,512	1,946	430	1	62	51	91	.280	.325	.470	.794
20	Eddie Mathews E. Mathews	663	1,029	3,752	703	1,039	165	34	253	645	9	609	34	16	4,456	2,031	452	23	27	47	50	.277	.382	.541	.923
21	Juan Gonzalez J. Gonzalez	659	817	3,130	480	887	172	13	214	214	35	609	16	11	3,406	1,727	399	2	25	40	87	.283	.334	.552	.885
22	Bryce Harper B. Harper	635	1,084	3,879	708	1,071	219	19	219	684	29	1,012	90	34	4,639	1,985	457	9	38	81	76	.276	.385	.512	.897
23	Goose Goslin G. Goslin	635	864	3,338	554	1,104	176	93	73	304	34	231	82		3,766	1,685	342	90				.331	.392	.505	.897
24	Mike Trout M. Trout	629	1,034	3,771	774	1,155	221	43	231	670	62	971	186	34	4,546	2,155	495	0	43	81	52	.306	.415	.571	.987
25	Bobby Doerr B. Doerr	623	1,034	3,893	572	1,134	221	42	103	401	4	337	36		4,377	1,748	366	79			69	.291	.358	.449	.807