Kenley Jansen

Positions: Relief Pitcher, Catcher and Centerfielder

Bats: Both • Throws: Right

6-5, 265lb (196cm, 120kg)

Team: Boston Red Sox (majors)

Born: September 30, 1987 in Willemstad, Curacao cw

Rookie Status: Exceeded rookie limits during 2011 season

2024 Contract Status: Signed thru 2024, 2 yrs/$32M (23-24)

Service Time (01/2024): 13.073 • Free Agent: 2025

Agents: Wasserman

Full Name: Kenley Geronimo Jansen

Nicknames: Kenleyfornia or Ma'montro

Pronunciation: \KEHN-lee JAN-sin\

Twitter: @kenleyjansen74

Instagram: @kenleyjansen74

View Player Info from the B-R Bullpen

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SUMMARY

2024

Career

WAR

0.3

20.9

ERA

1.59

2.52

823

424

5.2

819.1

1168

WHIP

1.588

0.961

Prospect Rankings

Player News

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2024 Spring Training

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Year	Age	AgeDif	Tm	Lg	Lev	Aff	W	L	W-L%	ERA	RA9	G	GS	GF	CG	SHO	SV	IP	H	R	ER	HR	BB	IBB	SO	HBP	BK	WP	BF	WHIP	H9	HR9	BB9	SO9	SO/W
2009	21	-2.0	Inland Empire	CALL	A+	LAD	0	0		4.63	4.63	12	0	4	0	0	0	11.2	14	6	6	1	11	0	19	0	1	1	58	2.143	10.8	0.8	8.5	14.7	1.73
2009	21	-2.3	Peoria Javelinas	AZFL	Fal		0	0		9.64	9.64	5	0	0	0	0	0	4.2	5	5	5	1	3	0	9	1	0	0	23	1.714	9.6	1.9	5.8	17.4	3.00
2010	22		2 Teams	2 Lgs	AA-A+	LAD	5	1	.833	1.60	1.80	33	0	17	0	0	8	45.0	29	9	8	0	23	1	78	0	0	4	184	1.156	5.8	0.0	4.6	15.6	3.39
2010	22	-2.2	Chattanooga	SOUL	AA	LAD	4	0	1.000	1.67	2.00	22	0	13	0	0	8	27.0	14	6	5	0	17	0	50	0	0	3	111	1.148	4.7	0.0	5.7	16.7	2.94
2010	22	-0.9	Inland Empire	CALL	A+	LAD	1	1	.500	1.50	1.50	11	0	4	0	0	0	18.0	15	3	3	0	6	1	28	0	0	1	73	1.167	7.5	0.0	3.0	14.0	4.67
2010	22	-6.7	LAD	NL	Maj	LAD	1	0	1.000	0.67	0.67	25	0	8	0	0	4	27.0	12	2	2	0	15	1	41	1	0	1	109	1.000	4.0	0.0	5.0	13.7	2.73
2011	23		2 Teams	2 Lgs	AA-A+	LAD	0	1	.000	3.38	3.38	7	2	1	0	0	0	8.0	2	3	3	1	3	1	13	0	0	0	28	0.625	2.3	1.1	3.4	14.6	4.33
2011	23	-1.1	Chattanooga	SOUL	AA	LAD	0	1	.000	4.50	4.50	5	0	1	0	0	0	6.0	2	3	3	1	3	1	9	0	0	0	22	0.833	3.0	1.5	4.5	13.5	3.00
2011	23	-0.2	Rancho Cucamonga	CALL	A+	LAD	0	0		0.00	0.00	2	2	0	0	0	0	2.0	0	0	0	0	0	0	4	0	0	0	6	0.000	0.0	0.0	0.0	18.0
2011	23	-5.5	LAD	NL	Maj	LAD	2	1	.667	2.85	2.85	51	0	13	0	0	5	53.2	30	17	17	3	26	0	96	2	2	0	218	1.043	5.0	0.5	4.4	16.1	3.69
2012	24	-4.5	LAD	NL	Maj	LAD	5	3	.625	2.35	2.49	65	0	40	0	0	25	65.0	33	18	17	6	22	1	99	3	0	3	252	0.846	4.6	0.8	3.0	13.7	4.50
2013	25	-3.1	LAD	NL	Maj	LAD	4	3	.571	1.88	1.88	75	0	45	0	0	28	76.2	48	16	16	6	18	1	111	3	0	2	292	0.861	5.6	0.7	2.1	13.0	6.17
2014	26	-2.5	LAD	NL	Maj	LAD	2	3	.400	2.76	2.76	68	0	57	0	0	44	65.1	55	20	20	5	19	2	101	0	0	2	268	1.133	7.6	0.7	2.6	13.9	5.32
2015	27	3.8	Rancho Cucamonga	CALL	A+	LAD	0	1	.000	5.06	5.06	6	5	0	0	0	0	5.1	6	3	3	1	1	0	8	0	0	0	21	1.313	10.1	1.7	1.7	13.5	8.00
2015	27	-1.4	LAD	NL	Maj	LAD	2	1	.667	2.41	2.41	54	0	50	0	0	36	52.1	33	14	14	6	8	0	80	2	0	0	200	0.783	5.7	1.0	1.4	13.8	10.00
2016	28	-0.1	LAD	NL	Maj	LAD	3	2	.600	1.83	1.83	71	0	63	0	0	47	68.2	35	14	14	4	11	2	104	2	0	1	251	0.670	4.6	0.5	1.4	13.6	9.45
2017	29	0.6	LAD	NL	Maj	LAD	5	0	1.000	1.32	1.45	65	0	57	0	0	41	68.1	44	11	10	5	7	0	109	2	1	2	258	0.746	5.8	0.7	0.9	14.4	15.57
2018	30	1.8	LAD	NL	Maj	LAD	1	5	.167	3.01	3.52	69	0	59	0	0	38	71.2	54	28	24	13	17	1	82	2	2	0	289	0.991	6.8	1.6	2.1	10.3	4.82
2019	31	2.7	LAD	NL	Maj	LAD	5	3	.625	3.71	4.00	62	0	51	0	0	33	63.0	51	28	26	9	16	0	80	4	3	2	263	1.063	7.3	1.3	2.3	11.4	5.00
2020	32	3.6	LAD	NL	Maj	LAD	3	1	.750	3.33	4.07	27	0	24	0	0	11	24.1	19	11	9	2	9	0	33	3	0	0	102	1.151	7.0	0.7	3.3	12.2	3.67
2021	33	4.1	LAD	NL	Maj	LAD	4	4	.500	2.22	2.74	69	0	52	0	0	38	69.0	36	21	17	4	36	4	86	2	2	4	278	1.043	4.7	0.5	4.7	11.2	2.39
2022	34	4.8	ATL	NL	Maj	ATL	5	2	.714	3.38	3.52	65	0	54	0	0	41	64.0	45	25	24	8	22	3	85	2	1	1	260	1.047	6.3	1.1	3.1	12.0	3.86
2023	35	6.3	BOS	AL	Maj	BOS	3	6	.333	3.63	4.23	51	0	42	0	0	29	44.2	40	21	18	5	17	1	52	2	2	1	188	1.276	8.1	1.0	3.4	10.5	3.06
2024	36	6.7	BOS	AL	Maj	BOS	0	0		1.59	1.59	6	0	4	0	0	4	5.2	1	1	1	0	8	0	9	1	0	1	27	1.588	1.6	0.0	12.7	14.3	1.13
Year	Age	AgeDif	Tm	Lg	Lev	Aff	W	L	W-L%	ERA	RA9	G	GS	GF	CG	SHO	SV	IP	H	R	ER	HR	BB	IBB	SO	HBP	BK	WP	BF	WHIP	H9	HR9	BB9	SO9	SO/W
Majors (15 seasons)					Majors		45	34	.570	2.52	2.71	823	0	619	0	0	424	819.1	536	247	229	76	251	16	1168	31	13	20	3255	0.961	5.9	0.8	2.8	12.8	4.65
Minors (4 seasons)					Minors		5	3	.625	2.57	2.70	58	7	22	0	0	8	70.0	51	21	20	3	38	2	118	0	1	5	291	1.271	6.6	0.4	4.9	15.2	3.11
Other (1 season)					Other		0	0		9.64	9.64	5	0	0	0	0	0	4.2	5	5	5	1	3	0	9	1	0	0	23	1.714	9.6	1.9	5.8	17.4	3.00
All Levels (16 Seasons)							50	37	.575	2.56	2.75	886	7	641	0	0	432	894.0	592	273	254	80	292	18	1295	32	14	25	3569	0.989	6.0	0.8	2.9	13.0	4.43

AA (2 seasons)					Minors		4	1	.800	2.18	2.45	27	0	14	0	0	8	33.0	16	9	8	1	20	1	59	0	0	3	133	1.091	4.4	0.3	5.5	16.1	2.95
A+ (4 seasons)					Minors		1	2	.333	2.92	2.92	31	7	8	0	0	0	37.0	35	12	12	2	18	1	59	0	1	2	158	1.432	8.5	0.5	4.4	14.4	3.28