Day-To-Day
Injury Ribs
2025 Stats
W-L
5-3
ERA
3.00
WHIP
1.08
K
48
SV
23
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

Working through rib pain
Jansen told reporters Wednesday that he is dealing with rib pain on his left side that he tweaked during a workout, Erica Weston of Bally Sports West reports.
Analysis
The injury factored into his performance against the Reds on Tuesday, when he gave up two runs on two hits and a walk while striking out one batter in one frame. He'll be shut down from throwing for the time being, but the veteran closer is hopeful to avoid a stint on the injured list. Reid Detmers and Ryan Zeferjahn are the top candidates to step up into high-leverage situations while Jansen is sidelined.
The injury factored into his performance against the Reds on Tuesday, when he gave up two runs on two hits and a walk while striking out one batter in one frame. He'll be shut down from throwing for the time being, but the veteran closer is hopeful to avoid a stint on the injured list. Reid Detmers and Ryan Zeferjahn are the top candidates to step up into high-leverage situations while Jansen is sidelined.
Pitching Stats
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2025 MLB Game Log
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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
16
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
-12%
BAA vs RHP
2025
-35%
BAA vs RHP
BAA | K | BB | H | HR | ||||
---|---|---|---|---|---|---|---|---|
Since 2023vs Left | .224 | 73 | 32 | 59 | 9 | |||
Since 2023vs Right | .198 | 89 | 21 | 55 | 7 | |||
2025vs Left | .244 | 19 | 14 | 22 | 4 | |||
2025vs Right | .159 | 29 | 2 | 14 | 3 | |||
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
-24%
ERA on Road
2025
-31%
ERA on Road
ERA | WHIP | IP | K/9 | BB/9 | |||||
---|---|---|---|---|---|---|---|---|---|
Since 2023Home | 3.75 | 1.18 | 74.1 | 8.5 | 3.0 | ||||
Since 2023Away | 2.84 | 1.08 | 73.0 | 11.3 | 3.5 | ||||
2025Home | 3.51 | 1.05 | 25.2 | 6.0 | 2.5 | ||||
2025Away | 2.42 | 1.12 | 22.1 | 12.5 | 3.6 | ||||
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
3.00K/9
9.0BB/9
3.0HR/9
1.3Fastball
93.3 mphERA
3.00WHIP
1.08BABIP
.249GB/FB
0.51Left On Base
82.9%Exit Velocity
84.7 mphBarrels/BBE
5.7%Spin Rate
2565 rpmBalls Hit 95+ MPH
25.0%Swinging Strike
13.0%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
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
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

Dealing with possible injury
Jansen said after Tuesday's loss to the Reds that he's dealing with "something physical" but declined to disclose the nature of the issue, Jeff Fletcher of The Orange County Register reports.
Analysis
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Rebounds with save Wednesday
Jansen notched a save against the Dodgers on Wednesday, retiring all three batters he faced in the ninth inning.
Analysis
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Notches save against former team
Jansen earned a save against the Dodgers on Monday, striking out two batters in a perfect ninth inning.
Analysis
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Collects 21st save
Jansen struck out two in a perfect ninth inning Saturday to record his 21st save of the season in a 7-4 win over the Tigers.
Analysis
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Notches win
Jansen (4-2) picked up the win Sunday against the White Sox, allowing one hit and one walk during a scoreless ninth inning. He didn't record a strikeout.
Analysis
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Latest Fantasy Rumors

Hoping to pitch four more seasons
Jansen said he's planning to pitch "at least four more years" after the 2025 campaign, reports Jeff Fletcher of The Orange County Register.
Analysis
The 37-year-old is in the midst of his 16th MLB season and continues to be an effective closer, as he's posted a 2.79 ERA, 1.07 WHIP and 40:13 K:BB across 42 innings with the Angels. Jansen joined the Halos on a one-year, $10 million contract over the winter, and it remains to be seen if he'll be back with the club for 2026. The organization seems likely to be interested in re-signing him given that he wasn't dealt at the trade deadline, but it wouldn't be surprising if he moved on to his fifth team in the past six seasons.
The 37-year-old is in the midst of his 16th MLB season and continues to be an effective closer, as he's posted a 2.79 ERA, 1.07 WHIP and 40:13 K:BB across 42 innings with the Angels. Jansen joined the Halos on a one-year, $10 million contract over the winter, and it remains to be seen if he'll be back with the club for 2026. The organization seems likely to be interested in re-signing him given that he wasn't dealt at the trade deadline, but it wouldn't be surprising if he moved on to his fifth team in the past six seasons.