Kenley Jansen

2026 seasonregular season

Bats/Throws: S/R
Height: 6' 5"
Weight: 265 lb
Age: 39
Born: Willemstad, Curacao
MLB debut: 2010-07-24

Pitch qualityour Stuff+ grades

How nasty each pitch is from its physical shape alone — velocity, spin, movement, extension and release point — on a scale where 100 is league average and every 10 points is one standard deviation. It does not see where the pitch was thrown, the count, or what happened to it, so a pitcher with great stuff and poor command can still give up runs. How it is built

116overall

Cutter119
Sinker110
Sweeper105
Slider104

Pitching

Season	G	GS	IP	ERA	WHIP	K	BB	HR	K/9	W-L	SV
2026	50	0	45.0	3.20	1.04	51	23	7	10.20	4-6	22

Last 10 games

Game	Dec	IP	H	BB	K	P
09/25vPITW	SV	1.0	0	0	2	13
09/23vWSHL		1.0	0	0	0	9
09/18@CWSW	SV	1.0	0	0	1	10
09/14@TORW	SV	1.0	0	1	1	13
09/12vCOLW		1.0	0	0	2	19
09/11vCOLW	SV	0.1	0	0	1	4
09/07vMINW	SV	1.0	0	1	0	11
09/06@CLEL		1.0	0	0	0	13
09/04@CLEL	L	1.2	1	0	2	20
09/02@MINW		0.1	1	1	1	17

Full 2026 game log (50 games)

Game	Dec	IP	H	ER	BB	K	HR	P
09/25vPITW	SV	1.0	0	0	0	2	0	13
09/23vWSHL		1.0	0	0	0	0	0	9
09/18@CWSW	SV	1.0	0	0	0	1	0	10
09/14@TORW	SV	1.0	0	0	1	1	0	13
09/12vCOLW		1.0	0	0	0	2	0	19
09/11vCOLW	SV	0.1	0	0	0	1	0	4
09/07vMINW	SV	1.0	0	0	1	0	0	11
09/06@CLEL		1.0	0	0	0	0	0	13
09/04@CLEL	L	1.2	1	0	0	2	0	20
09/02@MINW		0.1	1	0	1	1	0	17
08/29vLADW	W	0.1	0	0	0	0	0	4
08/25vTBW	SV	1.0	0	0	0	1	0	16
08/19@PITL	L	0.2	2	2	0	1	2	17
08/17@PITW	SV	1.0	0	0	0	2	0	8
08/13vCLEW	SV	1.0	0	0	0	0	0	10
08/11vCLEW	SV	1.0	1	1	2	0	0	29
08/09@SFW	W	1.0	0	0	0	3	0	15
08/01@ATHW	SV	1.0	2	1	0	2	0	20
07/29vBALL		1.0	0	0	1	1	0	18
07/24vKCW	SV	1.0	0	0	0	1	0	8
07/22@CHCW		1.0	0	0	1	1	0	19
07/20@CHCW	W	1.0	1	0	2	2	0	28
07/19@LAAL		1.0	0	0	1	2	0	19
07/11vPHIL		1.0	1	0	0	1	0	13
07/09vATHW	SV	1.0	1	0	1	1	0	19
07/05@TEXW	SV	1.0	0	0	0	0	0	8
07/02@TEXL		0.1	0	0	1	0	0	9
06/28vHOUL	L	1.1	2	3	1	1	1	28
06/25vHOUL		1.0	2	1	0	0	0	15
06/20vCWSW	SV	1.0	1	0	1	0	0	10
06/19vCWSW	SV	1.0	0	0	0	1	0	10
06/13@CLEL		1.0	0	0	0	2	0	9
05/27vLAAW		0.2	0	0	1	0	0	9
05/24@BALL	L	1.0	1	3	2	0	1	24
05/20vCLEL	HLD	1.0	0	0	1	1	0	18
05/16vTORL		1.0	0	0	0	1	0	12
05/15vTORW	W	1.0	0	0	0	2	0	16
05/13@NYML		1.0	0	0	0	3	0	14
05/10@KCW	SV	1.0	0	0	0	2	0	12
05/04vBOSL		1.0	0	0	1	1	0	10
04/29@ATLL	L	0.0	1	2	1	0	1	11
04/24@CINL	L	0.2	2	2	0	1	1	14
04/22vMILW	SV	1.0	1	0	2	1	0	36
04/18@BOSW	SV	1.0	1	0	0	0	0	14
04/15vKCW	SV	1.0	1	0	0	1	0	20
04/14vKCW	SV	1.0	1	0	0	0	0	15
04/10vMIAW	SV	1.0	0	0	0	1	0	12
04/04vSTLW		0.1	0	0	1	1	0	8
03/31@AZL		0.1	1	1	0	1	1	8
03/27@SDW	SV	1.0	0	0	0	3	0	11

Career by season

Season	G	IP	ERA	WHIP	K	BB	HR	K/9	W-L	SV
2010LAD	25	27.0	0.67	1.00	41	15	0	13.67	1-0	4
2011LAD	51	53.2	2.85	1.04	96	26	3	16.10	2-1	5
2012LAD	65	65.0	2.35	0.85	99	22	6	13.71	5-3	25
2013LAD	75	76.2	1.88	0.86	111	18	6	13.03	4-3	28
2014LAD	68	65.1	2.76	1.13	101	19	5	13.91	2-3	44
2015LAD	54	52.1	2.41	0.78	80	8	6	13.76	2-1	36
2016LAD	71	68.2	1.83	0.67	104	11	4	13.63	3-2	47
2017LAD	65	68.1	1.32	0.75	109	7	5	14.36	5-0	41
2018LAD	69	71.2	3.01	0.99	82	17	13	10.30	1-5	38
2019LAD	62	63.0	3.71	1.06	80	16	9	11.43	5-3	33
2020LAD	27	24.1	3.33	1.15	33	9	2	12.21	3-1	11
2021LAD	69	69.0	2.22	1.04	86	36	4	11.22	4-4	38
2022ATL	65	64.0	3.38	1.05	85	22	8	11.95	5-2	41
2023BOS	51	44.2	3.63	1.28	52	17	5	10.48	3-6	29
2024BOS	54	54.2	3.29	1.06	62	20	4	10.21	4-2	27
2025LAA	62	59.0	2.59	0.95	57	19	8	8.69	5-4	29
2026DET	50	45.0	3.20	1.04	51	23	7	10.20	4-6	22

Stats from the MLB Stats API, regular season only. A traded player's combined season appears as one row per club plus the total.