Mike Flanagan had the fewest at-bats when playing 15+ seasons, with 0 at-bats.

Interpreted as:

15 or more years played with fewest ab by a player

	NAME	AB	SEAS	G	R	H	2B	3B	HR	RBI	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	SF	IBB	GIDP	AVG	OBP	SLG	OPS	WRC	WRAA	WOBA	WRC+	BRAA
1	Mike Flanagan M. Flanagan	0	18	3	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
2	Darren O'Day D. O'Day	1	15	18	0	0	0	0	0	0	0	0	1	0	0	1	0	0	0	0	0	0	.000	.000	.000	.000	0	-0.2	.000	-123	-0.3
3	David Robertson D. Robertson	1	16	24	0	0	0	0	0	0	0	0	1	0	0	1	0	0	0	0	0	0	.000	.000	.000	.000	0	-0.2	.000	-112	-0.2
4	Fernando Rodney F. Rodney	1	17	167	0	0	0	0	0	0	0	0	0	0	0	1	0	0	0	0	0	0	.000	.000	.000	.000	0	-0.3	.000	-122	-0.3
5	Eddie Guardado E. Guardado	1	17	7	0	0	0	0	0	0	0	0	0	0	0	1	0	0	0	0	0	1	.000	.000	.000	.000	0	-0.3	.000	-118	-0.3
6	Jack Morris J. Morris	1	18	22	4	0	0	0	0	0	0	0	0	0	0	1	0	0	0	0	0	0	.000	.000	.000	.000	0	-0.3	.000	-114	-0.3
7	Aroldis Chapman A. Chapman	2	16	183	1	0	0	0	0	0	0	0	1	0	0	2	0	0	0	0	0	0	.000	.000	.000	.000	0	-0.5	.000	-121	-0.5
8	Craig Kimbrel C. Kimbrel	2	15	136	0	0	0	0	0	0	0	0	2	0	0	2	0	0	0	0	0	0	.000	.000	.000	.000	0	-0.5	.000	-111	-0.5
9	Joe Smith J. Smith	2	15	161	0	0	0	0	0	0	0	0	2	0	0	2	0	0	0	0	0	0	.000	.000	.000	.000	0	-0.5	.000	-116	-0.6
10	Francisco Rodriguez F. Rodriguez	2	16	76	0	1	0	0	0	0	0	0	1	0	0	2	1	0	0	0	0	0	.500	.500	.500	1.000	0	0.2	.445	187	0.2
11	Jeff Nelson J. Nelson	2	15	8	0	0	0	0	0	0	0	0	0	0	0	3	0	0	1	0	0	0	.000	.000	.000	.000	0	-0.9	.000	-118	-0.9
12	Bob Wickman B. Wickman	2	15	136	0	0	0	0	0	0	0	0	0	0	0	2	0	0	0	0	0	0	.000	.000	.000	.000	0	-0.6	.000	-121	-0.6
13	Roberto Hernandez R. Hernandez	2	17	27	0	1	0	0	0	0	0	0	1	0	0	2	1	0	0	0	0	0	.500	.500	.500	1.000	0	0.2	.450	178	0.2
14	Tom Gordon T. Gordon	2	21	22	0	0	0	0	0	0	0	0	0	0	0	2	0	0	0	0	0	0	.000	.000	.000	.000	0	-0.5	.000	-122	-0.6
15	Jose Mesa J. Mesa	2	19	162	1	0	0	0	0	0	1	0	1	0	0	4	0	0	1	0	0	0	.000	.333	.000	.333	0	-0.5	.238	-3	-0.5
16	Jimmy Key J. Key	2	15	2	0	0	0	0	0	0	0	0	2	0	0	3	0	0	1	0	0	0	.000	.000	.000	.000	0	-0.8	.000	-118	-0.8
17	Dave Stieb D. Stieb	2	16	12	2	0	0	0	0	0	0	0	0	0	0	2	0	0	0	0	0	0	.000	.000	.000	.000	0	-0.5	.000	-118	-0.5
18	Mariano Rivera M. Rivera	3	19	20	0	0	0	0	0	1	1	0	1	0	0	4	0	0	0	0	0	0	.000	.250	.000	.250	0	-0.5	.177	-7	-0.5
19	Alan Embree A. Embree	3	16	144	0	0	0	0	0	0	1	0	2	0	0	4	0	0	0	0	0	0	.000	.250	.000	.250	0	-0.5	.178	0	-0.5
20	Santiago Casilla S. Casilla	4	15	236	0	1	0	0	0	1	1	0	1	0	0	5	1	0	0	0	0	0	.250	.400	.250	.650	1	0	.316	103	0
21	Tommy Hunter T. Hunter	5	16	82	1	1	0	0	0	0	0	0	2	0	0	5	1	0	0	0	0	0	.200	.200	.200	.400	0	-0.6	.176	-3	-0.6
22	Randy Choate R. Choate	5	15	143	0	0	0	0	0	0	1	0	3	0	0	6	0	0	0	0	0	0	.000	.167	.000	.167	0	-1.1	.114	-41	-1.1
23	Rudy Seanez R. Seanez	5	17	208	1	0	0	0	0	0	1	0	5	0	0	6	0	0	0	0	0	0	.000	.167	.000	.167	0	-1.1	.120	-41	-1.1
24	Arthur Rhodes A. Rhodes	6	20	140	0	1	0	0	0	0	0	0	5	0	0	6	1	0	0	0	0	0	.167	.167	.167	.333	0	-0.9	.150	-23	-0.9
25	Sergio Romo S. Romo	7	15	320	0	0	0	0	0	0	0	0	5	0	0	7	0	0	0	0	0	0	.000	.000	.000	.000	-1	-1.8	.000	-116	-1.8