Barry Bonds has the most career bases on balls in the 1st inning, with 456 bases on balls.

Interpreted as:

most walks by a player in the first inning

	NAME	BB	G	AB	H	2B	3B	HR	RBI	HBP	SO	PA	TB	XBH	SH	SF	IBB	AVG	OBP	SLG	OPS
1	Barry Bonds B. Bonds	456	2,206	1,708	546	109	13	133	403	25	264	2,209	1,080	255	0	20	95	.320	.465	.632	1.097
2	Rickey Henderson R. Henderson	399	2,886	2,491	688	118	17	82	90	19	416	2,909	1,086	217	0	0	0	.276	.380	.436	.816
3	Chipper Jones C. Jones	337	2,170	1,806	527	108	6	81	321	4	321	2,172	890	195	0	25	4	.292	.400	.493	.892
4	Frank Thomas F. Thomas	337	1,993	1,610	469	93	3	109	349	15	266	1,997	895	205	0	35	9	.291	.411	.556	.967
5	Jeff Bagwell J. Bagwell	327	1,888	1,508	430	102	0	71	301	24	327	1,891	745	173	0	32	7	.285	.413	.494	.907
6	Gary Sheffield G. Sheffield	293	2,172	1,821	548	82	9	118	394	30	268	2,173	1,002	209	1	28	5	.301	.401	.550	.951
7	Ken Griffey Jr. K. Griffey Jr.	281	2,293	1,957	551	99	4	111	370	23	406	2,294	991	214	0	33	8	.282	.373	.506	.879
8	Alex Rodriguez A. Rodriguez	273	2,227	1,890	544	97	2	122	379	39	445	2,233	1,011	221	8	23	1	.288	.385	.535	.920
9	Wade Boggs W. Boggs	271	2,148	1,871	593	123	8	20	102	4	148	2,157	792	151	2	9	2	.317	.403	.423	.826
10	Keith Hernandez K. Hernandez	263	1,620	1,338	388	75	9	24	219	3	234	1,623	553	108	1	18	2	.290	.403	.413	.817
11	Joey Votto J. Votto	262	1,775	1,476	464	100	6	73	241	18	328	1,775	795	179	0	19	1	.314	.419	.539	.958
12	Jim Thome J. Thome	259	1,315	1,031	285	52	1	76	294	8	317	1,316	567	129	0	18	11	.276	.419	.550	.969
13	Willie Randolph W. Randolph	256	1,677	1,412	383	52	8	13	47	4	143	1,684	490	73	10	2	0	.271	.384	.347	.731
14	Bobby Abreu B. Abreu	251	1,924	1,649	483	107	12	55	277	6	365	1,927	779	174	1	20	0	.293	.384	.472	.857
15	Jack Clark J. Clark	251	1,370	1,092	267	62	1	38	207	8	250	1,372	445	101	0	21	10	.245	.383	.408	.791
16	David Ortiz D. Ortiz	245	1,628	1,368	409	97	3	85	337	4	316	1,630	767	185	0	13	8	.299	.404	.561	.964
17	Albert Pujols A. Pujols	244	2,554	2,257	662	147	2	154	469	18	275	2,557	1,275	303	0	38	20	.293	.361	.565	.926
18	Joe Morgan J. Morgan	244	1,300	1,038	271	57	6	32	109	4	115	1,305	436	95	2	17	0	.261	.398	.420	.818
19	Cal Ripken Jr. C. Ripken Jr.	236	2,031	1,757	441	92	13	48	286	8	221	2,032	703	153	0	31	2	.251	.337	.400	.737
20	Tim Raines T. Raines	233	2,103	1,858	543	82	31	25	80	9	220	2,111	762	138	4	7	1	.292	.373	.410	.783
21	Kenny Lofton K. Lofton	232	1,911	1,676	503	70	28	30	39	7	247	1,921	719	128	5	1	1	.300	.387	.429	.816
22	Bryce Harper B. Harper	231	1,534	1,282	347	68	5	70	188	9	372	1,537	635	143	2	13	5	.271	.382	.495	.878
23	Todd Helton T. Helton	228	1,519	1,253	385	85	5	48	261	9	206	1,519	624	138	0	28	8	.307	.410	.498	.908
24	Miguel Cabrera M. Cabrera	227	2,156	1,882	567	100	2	92	364	16	402	2,158	947	194	1	32	11	.301	.376	.503	.879
25	Brett Butler B. Butler	227	2,049	1,822	524	60	26	8	17	7	203	2,063	660	94	6	1	0	.288	.368	.362	.731