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

0.5

21.1

ERA

2.63

2.52

831

427

13.2

827.1

1178

WHIP

1.244

0.961

2023 Player Pitching Game Log

2023 Player Pitching Game Log
Rk	Date	Lev	Tm		Opp	Inngs	Dec	IP	H	R	ER	BB	SO	HR	HBP	AB	2B	IBB	SB	CS	BF	Pit	Str	StL	StS	GB	FB	LD	PU
1	2023-04-01	Maj-AL	Boston Red Sox		Baltimore Orioles	9-9	W	1.0	1	0	0	1	2	0	0	4	0	0	1	0	5	19	12	2	5	1	1	0	0
2	2023-04-06	Maj-AL	Boston Red Sox	@	Detroit Tigers	9-9	S	1.0	0	0	0	0	0	0	0	3	0	0	0	0	3	16	11	2	2	1	2	0	0
3	2023-04-09	Maj-AL	Boston Red Sox	@	Detroit Tigers	9-9	S	1.0	2	0	0	1	2	0	0	5	1	0	0	0	6	27	19	4	2	1	2	0	0
4	2023-04-14	Maj-AL	Boston Red Sox		Los Angeles Angels	9-9	S	1.0	1	0	0	0	3	0	0	4	0	0	0	0	4	13	11	3	4	0	1	0	0
5	2023-04-15	Maj-AL	Boston Red Sox		Los Angeles Angels	9-9	S	1.0	0	0	0	0	0	0	0	3	0	0	0	0	3	7	7	2	1	0	3	1	1
6	2023-04-18	Maj-AL	Boston Red Sox		Minnesota Twins	9-9		1.0	0	0	0	0	2	0	0	3	0	0	0	0	3	13	9	2	2	0	1	0	0
7	2023-04-21	Maj-AL	Boston Red Sox	@	Milwaukee Brewers	9-9	S	1.0	0	0	0	0	2	0	0	3	0	0	0	0	3	12	8	1	1	0	1	0	1
8	2023-04-25	Maj-AL	Boston Red Sox	@	Baltimore Orioles	9-9	S	0.2	0	0	0	0	0	0	0	2	0	0	0	0	2	11	9	2	1	1	1	1	0
9	2023-04-29	Maj-AL	Boston Red Sox		Cleveland Guardians	9-9		1.0	3	1	1	0	1	0	0	6	0	0	1	0	6	29	22	6	0	1	4	2	0
10	2023-05-05	Maj-AL	Boston Red Sox	@	Philadelphia Phillies	9-9	S	1.0	1	0	0	1	3	0	0	4	0	0	0	0	5	22	13	2	7	0	1	1	0
11	2023-05-06	Maj-AL	Boston Red Sox	@	Philadelphia Phillies	9-9	S	1.0	1	0	0	0	1	0	0	4	0	0	0	0	4	14	11	0	2	1	2	1	0
12	2023-05-10	Maj-AL	Boston Red Sox	@	Atlanta Braves	9-9	S	1.0	1	0	0	0	1	0	0	4	1	0	0	0	4	15	12	2	3	0	3	1	0
13	2023-05-12	Maj-AL	Boston Red Sox		St. Louis Cardinals	9-9	L	0.0	3	3	3	1	0	1	0	3	1	0	2	0	4	22	12	4	1	0	3	2	0
14	2023-05-13	Maj-AL	Boston Red Sox		St. Louis Cardinals	9-9	L	1.0	1	3	2	3	0	0	0	4	1	1	1	0	7	17	8	3	1	2	2	1	1
15	2023-05-20	Maj-AL	Boston Red Sox	@	San Diego Padres	9-9	S	1.0	0	0	0	2	0	0	0	3	0	0	1	0	5	19	8	4	0	0	3	0	2
16	2023-05-24	Maj-AL	Boston Red Sox	@	Los Angeles Angels	8-8		1.0	0	0	0	1	0	0	0	3	0	0	0	0	4	14	9	2	1	1	2	0	2
17	2023-05-27	Maj-AL	Boston Red Sox	@	Arizona Diamondbacks	9-9	S	1.0	0	0	0	0	1	0	0	3	0	0	0	0	3	13	9	2	2	0	2	0	0
18	2023-06-01	Maj-AL	Boston Red Sox		Cincinnati Reds	9-9		1.0	0	0	0	1	0	0	0	3	0	0	0	0	4	13	6	2	0	1	2	0	1
19	2023-06-03	Maj-AL	Boston Red Sox		Tampa Bay Rays	9-9	S	1.0	1	0	0	0	3	0	0	4	1	0	0	0	4	16	11	2	4	0	1	1	0
20	2023-06-03 (2)	Maj-AL	Boston Red Sox		Tampa Bay Rays	9-9	L	1.0	3	2	2	1	1	0	0	6	1	0	0	0	7	27	15	2	5	0	5	3	1
21	2023-06-06	Maj-AL	Boston Red Sox	@	Cleveland Guardians	9-9	S	1.0	0	0	0	0	1	0	0	3	0	0	0	0	3	13	9	3	3	1	1	0	0
22	2023-06-09	Maj-AL	Boston Red Sox	@	New York Yankees	9-9	S	1.0	2	0	0	0	1	0	0	5	0	0	0	0	5	17	12	2	2	1	3	0	1
23	2023-06-11	Maj-AL	Boston Red Sox	@	New York Yankees	9-9	W	1.0	0	0	0	0	1	0	0	3	0	0	0	0	3	10	8	3	2	2	0	0	0
24	2023-06-12	Maj-AL	Boston Red Sox		Colorado Rockies	9-9		1.0	0	0	0	0	1	0	0	3	0	0	0	0	3	10	6	3	1	1	1	0	1
25	2023-06-18 (2)	Maj-AL	Boston Red Sox		New York Yankees	9-9	S	1.0	1	0	0	0	2	0	0	4	0	0	0	0	4	13	11	2	4	1	1	0	0
26	2023-06-21	Maj-AL	Boston Red Sox	@	Minnesota Twins	9-9		1.0	0	0	0	0	1	0	0	3	0	0	0	0	3	9	6	2	1	1	1	0	1
27	2023-06-23	Maj-AL	Boston Red Sox	@	Chicago White Sox	9-9	S	1.0	0	0	0	0	1	0	0	3	0	0	0	0	3	9	8	5	0	2	0	0	0
28	2023-06-24	Maj-AL	Boston Red Sox	@	Chicago White Sox	9-9	L	0.2	2	1	1	0	1	0	0	4	0	0	1	0	4	14	10	4	1	2	1	1	0
29	2023-06-29	Maj-AL	Boston Red Sox		Miami Marlins	9-9		1.0	3	1	1	0	1	1	0	5	0	0	1	1	5	15	9	4	1	1	3	1	1
30	2023-07-01	Maj-AL	Boston Red Sox	@	Toronto Blue Jays	8-9	S	1.1	3	1	1	0	3	0	0	6	1	0	2	0	6	22	17	4	4	0	3	2	0
31	2023-07-05	Maj-AL	Boston Red Sox		Texas Rangers	9-9	S	1.0	0	0	0	0	0	0	0	3	0	0	0	0	3	11	8	2	0	1	2	1	1
32	2023-07-09	Maj-AL	Boston Red Sox		Oakland Athletics	9-9	S	1.0	0	0	0	1	1	0	0	2	0	0	0	1	3	20	10	2	3	0	1	0	0
33	2023-07-14	Maj-AL	Boston Red Sox	@	Chicago Cubs	9-9	S	0.1	0	0	0	0	1	0	0	1	0	0	0	0	1	3	3	2	1	0	0	0	0
34	2023-07-19	Maj-AL	Boston Red Sox	@	Oakland Athletics	8-8		1.0	0	0	0	1	1	0	0	3	0	0	0	0	4	19	13	2	3	0	2	0	1
35	2023-07-22	Maj-AL	Boston Red Sox		New York Mets	9-9	S	0.1	1	0	0	0	0	0	0	2	0	0	0	0	2	8	6	2	0	0	2	1	0
36	2023-07-26	Maj-AL	Boston Red Sox		Atlanta Braves	9-9	S	1.0	1	0	0	0	1	0	1	3	0	0	0	1	4	17	13	1	3	0	2	1	1
37	2023-07-28	Maj-AL	Boston Red Sox	@	San Francisco Giants	9-9	S	1.0	0	0	0	0	2	0	0	3	0	0	0	0	3	9	8	2	3	0	1	0	0
38	2023-07-29	Maj-AL	Boston Red Sox	@	San Francisco Giants	9-9	L	0.0	1	1	1	0	0	1	0	1	0	0	0	0	1	1	1	0	0	0	1	0	0
39	2023-08-01	Maj-AL	Boston Red Sox	@	Seattle Mariners	9-9	S	1.0	0	0	0	0	1	0	0	3	0	0	0	0	3	15	11	3	3	0	2	0	1
40	2023-08-07	Maj-AL	Boston Red Sox		Kansas City Royals	9-9	W	1.0	0	0	0	0	2	0	0	3	0	0	0	0	3	13	11	4	0	0	1	0	0
41	2023-08-09	Maj-AL	Boston Red Sox		Kansas City Royals	9-9	S	1.0	1	1	1	1	1	1	0	3	0	0	0	1	4	19	11	3	2	1	1	0	0
42	2023-08-10	Maj-AL	Boston Red Sox		Kansas City Royals	9-9	S	1.0	0	0	0	0	2	0	0	3	0	0	0	0	3	16	11	3	2	0	1	0	0
43	2023-08-13	Maj-AL	Boston Red Sox		Detroit Tigers	9-9	S	1.0	1	0	0	0	0	0	0	4	0	0	0	0	4	12	8	0	2	0	4	1	2
44	2023-08-15	Maj-AL	Boston Red Sox	@	Washington Nationals	9-9	S	1.0	0	0	0	0	1	0	0	3	0	0	0	0	3	5	5	1	1	0	2	0	1
45	2023-08-20	Maj-AL	Boston Red Sox	@	New York Yankees	9-9	S	1.0	1	0	0	0	2	0	1	4	1	0	0	0	5	16	12	2	3	0	2	0	0
46	2023-08-23	Maj-AL	Boston Red Sox	@	Houston Astros	9-9		0.1	0	0	0	0	0	0	0	1	0	0	0	0	1	3	1	0	0	0	1	0	0
47	2023-08-30	Maj-AL	Boston Red Sox		Houston Astros	8-8		1.0	0	0	0	0	1	0	0	3	0	0	0	0	3	9	7	1	1	1	1	1	0
48	2023-09-03	Maj-AL	Boston Red Sox	@	Kansas City Royals	9-9		1.0	3	2	2	0	1	0	0	6	1	0	2	0	6	21	15	3	2	0	5	1	0
49	2023-09-04	Maj-AL	Boston Red Sox	@	Tampa Bay Rays	9-9		1.0	0	0	0	0	0	0	0	3	0	0	0	0	3	8	6	0	2	0	3	2	1
50	2023-09-05	Maj-AL	Boston Red Sox	@	Tampa Bay Rays	11-11	L	0.0	1	3	2	1	0	1	0	1	0	0	0	0	2	13	7	0	1	0	1	0	0
51	2023-09-12 (2)	Maj-AL	Boston Red Sox		New York Yankees	9-9		0.0	1	2	1	1	0	0	0	1	0	0	1	0	2	12	5	0	1	0	1	1	0

2023 Player Pitching Splits

2023 Player Pitching Splits
Split	G	PA	AB	R	H	2B	3B	HR	SB	CS	BB	SO	BA	OBP	SLG	OPS	BAbip	TB	GDP	HBP	SH	SF	IBB
Total	51	188	169	21	40	9	0	5	13	4	17	52	.237	.314	.379	.693	.313	64	0	2	0	0	1

Home	23	90	79	13	22	4	0	3	7	4	10	24	.279	.367	.443	.810	.365	35	0	1	0	0	1
Away	28	98	90	8	18	5	0	2	6	0	7	28	.200	.265	.322	.588	.267	29	0	1	0	0	0

April	9	35	33	1	7	1	0	0	2	0	2	12	.212	.257	.242	.500	.333	8	0	0	0	0	0
May	8	36	28	6	7	3	0	1	4	0	8	6	.250	.417	.464	.881	.286	13	0	0	0	0	1
June	12	48	46	4	12	2	0	1	2	1	2	14	.261	.292	.370	.661	.355	17	0	0	0	0	0
July	9	27	24	2	6	1	0	1	2	2	2	9	.250	.333	.417	.750	.357	10	0	1	0	0	0
August	9	29	27	1	3	1	0	1	0	1	1	10	.111	.172	.259	.432	.125	7	0	1	0	0	0
September	4	13	11	7	5	1	0	1	3	0	2	1	.455	.539	.818	1.357	.444	9	0	0	0	0	0

As Reliever	51	188	169	21	40	9	0	5	13	4	17	52	.237	.314	.379	.693	.313	64	0	2	0	0	1

vs RHB as RHP	45	99	88		24	6	0	2			9	27	.273	.354	.409	.763	.373	36	0	2	0	0	0
vs LHB as RHP	47	89	81		16	3	0	3			8	25	.198	.270	.346	.615	.245	28	0	0	0	0	1

Bases Empty	48	114	104		22	5	0	3			9	30	.212	.281	.346	.627	.268	36	0	1	0	0	0
Runners On	30	74	65		18	4	0	2			8	22	.277	.365	.431	.796	.390	28	0	1	0	0	1

vs. Younger Batters	51	182	164		39	8	0	5			16	51	.238	.313	.378	.691	.315	62	0	2	0	0	1
vs. Older Batters	6	6	5		1	1	0	0			1	1	.200	.333	.400	.733	.250	2	0	0	0	0	0

Table
Split	W	L	W-L%	ERA	G	GS	SV	IP	H	R	ER	HR	BB	IBB	SO	HBP	BK	WP	BF	WHIP	SO9	SO/W
Total	3	6	.333	3.63	51	0	29	44.2	40	21	18	5	17	1	52	2	2	1	188	1.276	10.5	3.06

Home	2	3	.400	4.87	23	0	11	20.1	22	13	11	3	10	1	24	1	2	1	90	1.574	10.6	2.40
Away	1	3	.250	2.59	28	0	18	24.1	18	8	7	2	7	0	28	1	0	0	98	1.027	10.4	4.00

April	1	0	1.000	1.04	9	0	6	8.2	7	1	1	0	2	0	12	0	0	0	35	1.039	12.5	6.00
May	0	2	.000	6.43	8	0	5	7.0	7	6	5	1	8	1	6	0	0	0	36	2.143	7.7	0.75
June	1	2	.333	3.09	12	0	5	11.2	12	4	4	1	2	0	14	0	0	1	48	1.200	10.8	7.00
July	0	1	.000	2.57	9	0	7	7.0	6	2	2	1	2	0	9	1	1	0	27	1.143	11.6	4.50
August	1	0	1.000	1.08	9	0	6	8.1	3	1	1	1	1	0	10	1	1	0	29	0.480	10.8	10.00
September	0	1	.000	22.50	4	0	0	2.0	5	7	5	1	2	0	1	0	0	0	13	3.500	4.5	0.50

As Reliever	3	6	.333	3.63	51	0	29	44.2	40	21	18	5	17	1	52	2	2	1	188	1.276	10.5	3.06

Please note that splits include both major and minor league stats. We have decided that the splits across all levels is more useful than just minor league stats.

More Jansen Pages

Kenley Jansen Overview

Minor, Winter & Fall Lg Stats

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Batting Splits

Pitching Game Logs

Batting Game Logs

Fielding Game Logs

Pitching Finders & Advanced Stats

Batting Finders & Advanced Stats

Fielding Finders & Advanced Stats

Advanced Stats

Minor League Batting Game Logs & Splits (s.2008)

Minor League Pitching Game Logs & Splits (s.2008)

More Kenley Jansen Pages at Baseball Reference

Kenley Jansen

2023 Player Pitching Game Log

2023 Player Pitching Splits

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