2025 Stats
W-L
1-2
ERA
4.37
WHIP
1.32
K
19
SV
14
Rest-of-Season Projections
2025 Fantasy Outlook
Jansen led Boston with 27 saves (12th in the league) and a 67.5% team save share that ranked 10th among closers. The veteran's outputs were fairly consistent with recent seasons and he remained healthy for the most part, overcoming minor back and lat ailments before closing out September on the injured list with right shoulder inflammation. The 37-year-old free-agent leads active relievers with 447 career saves and is 32 away from third place on the all-time list. Landing with the Angels should provide him a solid grip on the closer role, but flamethrower Ben Joyce is waiting in the wings and could see occasional save chances. Read Past Outlooks

Gets last out Monday
Jansen recorded the final out in Monday's 7-4 win over the Athletics.
ANALYSIS
Shaun Anderson allowed two runs in a non-save situation in the ninth inning, prompting Jansen's entry with two outs and the bases empty. Jansen was tidy, getting a groundout from Luis Urias on three pitches to end the game. Jansen has pitched much better in save situations than non-save situations this season, in part because he gave up six earned runs May 2 in a non-save situation. He's now at a 4.57 ERA, 1.34 WHIP and 19:9 K:BB while earning 14 saves over 21.2 innings this season.
Shaun Anderson allowed two runs in a non-save situation in the ninth inning, prompting Jansen's entry with two outs and the bases empty. Jansen was tidy, getting a groundout from Luis Urias on three pitches to end the game. Jansen has pitched much better in save situations than non-save situations this season, in part because he gave up six earned runs May 2 in a non-save situation. He's now at a 4.57 ERA, 1.34 WHIP and 19:9 K:BB while earning 14 saves over 21.2 innings this season.
Pitching Stats
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2019
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Minor League Game Log

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Pitching Appearances Breakdown
Average Pitch Count
14
Last 10 Games
15
Last 5 Games
12
How many pitches does Kenley Jansen generally throw?
1-10
11-20
21-30
31-40
41-50
51-60
61-70
71-80
81-90
91-100
101-110
111-120
121+
What part of the game does Kenley Jansen generally pitch?
1st
2nd
3rd
4th
5th
6th
7th
8th
9th
Extra
% Games Reaching Innings Threshold
% Games By Number of Innings Pitched
Left/Right Pitching Splits
Since 2023
-9%
BAA vs RHP
2025
-37%
BAA vs RHP
BAA | K | BB | H | HR | ||||
---|---|---|---|---|---|---|---|---|
Since 2023vs Left | .230 | 64 | 25 | 51 | 8 | |||
Since 2023vs Right | .210 | 69 | 21 | 48 | 6 | |||
2025vs Left | .286 | 10 | 7 | 14 | 3 | |||
2025vs Right | .179 | 9 | 2 | 7 | 2 | |||
2024vs Left | .228 | 29 | 10 | 21 | 2 | |||
2024vs Right | .167 | 33 | 10 | 17 | 2 | |||
2023vs Left | .198 | 25 | 8 | 16 | 3 | |||
2023vs Right | .273 | 27 | 9 | 24 | 2 | |||
More Splits→ | View More Split Stats |
Home/Away Pitching Splits
Since 2023
-32%
ERA on Road
2025
-60%
ERA on Road
ERA | WHIP | IP | K/9 | BB/9 | |||||
---|---|---|---|---|---|---|---|---|---|
Since 2023Home | 4.34 | 1.26 | 58.0 | 9.0 | 3.1 | ||||
Since 2023Away | 2.95 | 1.13 | 64.0 | 10.5 | 3.7 | ||||
2025Home | 6.75 | 1.29 | 9.1 | 4.8 | 1.9 | ||||
2025Away | 2.70 | 1.35 | 13.1 | 9.5 | 4.7 | ||||
2024Home | 3.18 | 1.02 | 28.1 | 9.2 | 2.5 | ||||
2024Away | 3.42 | 1.10 | 26.1 | 11.3 | 4.1 | ||||
2023Home | 4.87 | 1.57 | 20.1 | 10.6 | 4.4 | ||||
2023Away | 2.59 | 1.03 | 24.1 | 10.4 | 2.6 | ||||
More Splits→ | View More Split Stats |
Stat Review
How does Kenley Jansen compare to other relievers?
This section compares his stats with all relief pitcher seasons from the previous three seasons (minimum 30 innings)*. The bar represents the player's percentile rank. For example, if the bar is halfway across, then the player falls into the 50th percentile for that stat and it would be considered average.
* Exit Velocity, Barrels/BBE %, Balls Hit 95+ MPH %, and Spin Rate are benchmarked against 2019 data (min 30 IP). See here for more exit velocity/barrels stats plus an explanation of current limitations with that data set.
* Exit Velocity, Barrels/BBE %, Balls Hit 95+ MPH %, and Spin Rate are benchmarked against 2019 data (min 30 IP). See here for more exit velocity/barrels stats plus an explanation of current limitations with that data set.
K/BB
2.11K/9
7.5BB/9
3.6HR/9
2.0Fastball
93.0 mphERA
4.37WHIP
1.32BABIP
.263GB/FB
0.33Left On Base
82.6%Exit Velocity
85.8 mphBarrels/BBE
8.3%Spin Rate
2544 rpmBalls Hit 95+ MPH
27.5%Swinging Strike
12.0%Advanced Pitching Stats
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Defensive Stats
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Stats Vs Today's Lineup
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Past Fantasy Outlooks
2024
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2022
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2019
2018
2017
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2013
2012
2011
Jansen recorded his 400th career save last May en route to his 4th All-Star nomination. The veteran closer finished with 29 saves, enough to overtake Craig Kimbrel for the top spot on the active saves leaderboard. Jansen only made 51 appearances, his lowest mark since 2015, as he dealt with various ailments (back, knee, hamstring). Only a bout with COVID required a trip to the IL, though, and Jansen was still able to close out 67.4% of Boston's total saves. While there was concern he would have trouble adjusting to the pitch clock - he was dead last in pitch tempo (18.9 sec) with the bases empty - he only had 3 pitch clock violations all year, all in one game. Jansen also added velocity, averaging 94.3 mph (+2.1% difference from 2022) on his trademark cutter that he threw 78.8% of the time. Jansen is clearly on the downswing of his career - his 1.28 WHIP last season was his worst to date - but expecting another 25+ saves from him is not unreasonable.
More Fantasy News

Gives up homer, secures save
Jansen allowed a run on one hit over one inning to earn the save in Saturday's 8-6 win over the Mariners.
ANALYSIS
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Converts 13th save
Jansen struck out one in a perfect inning to earn the save in Friday's 5-4 win over the Mariners.
ANALYSIS
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Nabs win in ninth Tuesday
Jansen (1-2) walked two and struck out one in a scoreless ninth inning Tuesday to record the win in a 4-3 extra-inning victory over the Red Sox.
ANALYSIS
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Cleanly works save
Jansen worked a clean ninth inning, striking out one, to pick up the save during Monday's 7-6 win over the Red Sox.
ANALYSIS
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Notches 11th save
Jansen walked two and struck out one over a scoreless and hitless inning to earn the save in Friday's 7-4 win over the Marlins.
ANALYSIS
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Latest Fantasy Rumors

Likely to generate interest
Jansen could generate some interest before the summer trade deadline, according to Jim Bowden of The Athletic.
ANALYSIS
Jansen has been perfect in all 14 of his save opportunities this season while posting a 4.64 ERA and a 1.36 WHIP across 21.1 innings on 23 outings. He's not the lockdown closer he was during his prime years, but he should garner some decent trade interest near the deadline, particularly from contending teams needing to shore up their bullpen.
Jansen has been perfect in all 14 of his save opportunities this season while posting a 4.64 ERA and a 1.36 WHIP across 21.1 innings on 23 outings. He's not the lockdown closer he was during his prime years, but he should garner some decent trade interest near the deadline, particularly from contending teams needing to shore up their bullpen.