Kenley Jansen
37-Year-Old
15-Day IL
Injury Shoulder
Est. Return 2/1/2025
2024 Stats
W-L
4-2
ERA
3.29
WHIP
1.06
K
62
SV
27
Rest-of-Season Projections
2024 Fantasy Outlook
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. Read Past Outlooks
IL move made official
The Red Sox placed Jansen on the 15-day injured list Monday with right shoulder inflammation, Jen McCaffrey of The Athletic reports.
ANALYSIS
The move was reported Sunday and now the transaction is official, which ends Jansen's season. Jansen has battled through a shoulder problem throughout this month, and since the Red Sox are out of the playoff hunt, they have opted to go ahead and shut him down. The Red Sox will turn to Chris Martin and Justin Slaten as closer options over the final week of the season. Jansen will be a free agent this offseason and has likely thrown his last pitch for the Red Sox.
The move was reported Sunday and now the transaction is official, which ends Jansen's season. Jansen has battled through a shoulder problem throughout this month, and since the Red Sox are out of the playoff hunt, they have opted to go ahead and shut him down. The Red Sox will turn to Chris Martin and Justin Slaten as closer options over the final week of the season. Jansen will be a free agent this offseason and has likely thrown his last pitch for the Red Sox.
Pitching Stats
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2024
2023
2022
2021
2020
2019
2018
2017
Minor League Game Log
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Pitching Appearances Breakdown
Average Pitch Count
15
Last 10 Games
14
Last 5 Games
13
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 2022
-7%
BAA vs RHP
2024
-27%
BAA vs RHP
BAA | K | BB | H | HR | ||||
---|---|---|---|---|---|---|---|---|
Since 2022vs Left | .214 | 93 | 30 | 60 | 10 | |||
Since 2022vs Right | .199 | 106 | 29 | 63 | 7 | |||
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 | |||
2022vs Left | .213 | 39 | 12 | 23 | 5 | |||
2022vs Right | .175 | 46 | 10 | 22 | 3 | |||
More Splits→ | View More Split Stats |
Home/Away Pitching Splits
Since 2022
-18%
ERA on Road
2024
-7%
ERA at Home
ERA | WHIP | IP | K/9 | BB/9 | |||||
---|---|---|---|---|---|---|---|---|---|
Since 2022Home | 3.75 | 1.18 | 84.0 | 11.0 | 3.2 | ||||
Since 2022Away | 3.06 | 1.05 | 79.1 | 10.9 | 3.3 | ||||
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 | ||||
2022Home | 3.57 | 1.08 | 35.1 | 12.7 | 3.1 | ||||
2022Away | 3.14 | 1.01 | 28.2 | 11.0 | 3.1 | ||||
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
3.10K/9
10.2BB/9
3.3HR/9
0.7Fastball
93.3 mphERA
3.29WHIP
1.06BABIP
.269GB/FB
0.68Left On Base
72.5%Exit Velocity
84.5 mphBarrels/BBE
7.1%Spin Rate
2593 rpmBalls Hit 95+ MPH
23.0%Swinging Strike
12.1%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
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
2012
2011
Jansen wore a different uniform in 2022, but finished second in the league with 41 saves for Atlanta to bring his career total to 391, which ranks eighth all-time and second among active saves leaders. The 35-year-old has been fairly consistent over the past few seasons, with both his pitch mix and output. Jansen threw his famous cutter 65% of the time as his primary strikeout pitch, while occasionally mixing in a sinker (22%) that he mostly threw against left-handed batters, and a slider (13%). The veteran's arsenal yielded a respectable 3.38 ERA (2.76 SIERA), 1.05 WHIP and 32.7% strikeout rate, the latter being his highest since 2017. He also lowered his walk rate to 8.5% and his average velocity (93.7 mph) was surprisingly among the best of his career. If Jansen can maintain this level of production in his mid-to-late 30s, he's a lock to join the top five all-time saves leaders. He'll get the opportunity to do just that after signing a two-year, $32 million deal with Boston.
More Fantasy News
Set to go on IL
Manager Alex Cora told reporters Sunday that Jansen is likely to be placed on the 15-day injured list Monday due to a right shoulder injury, Chris Cotillo of MassLive.com reports.
ANALYSIS
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Returns with clean frame
Jansen (shoulder) threw a perfect ninth inning in Friday's extra-innings loss to the Twins. He did not record a strikeout.
ANALYSIS
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Battling shoulder issue
Manager Alex Cora said after Wednesday's game versus Tampa Bay that Jansen is dealing with a shoulder injury, Pete Abraham of The Boston Globe reports.
ANALYSIS
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Sharp for 26th save
Jansen (lat) struck out one in a perfect inning to earn the save in Saturday's 7-5 win over the White Sox.
ANALYSIS
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Available Saturday
Manager Alex Cora said that Jansen (lat) is available to pitch in Saturday's game against the White Sox, Alex Speier of The Boston Globe reports.
ANALYSIS
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Latest Fantasy Rumors
Likely to be moved
Jansen was labeled one of the relievers most likely to be dealt at the trade deadline in a survey of 35 MLB executives, reports Jim Bowden of The Athletic.
ANALYSIS
The Red Sox are only a half-game back of the final wild-card spot in the American League, so it would be a bit surprising for them to trade away their closer. However, Jansen will be a free agent after the season, so it could make sense for him to be dealt if the return is able to fill another immediate need. The veteran right-hander has converted 15 of 16 save chances this season with a 2.30 ERA, 1.06 WHIP and 32:11 K:BB over 27.1 innings.
The Red Sox are only a half-game back of the final wild-card spot in the American League, so it would be a bit surprising for them to trade away their closer. However, Jansen will be a free agent after the season, so it could make sense for him to be dealt if the return is able to fill another immediate need. The veteran right-hander has converted 15 of 16 save chances this season with a 2.30 ERA, 1.06 WHIP and 32:11 K:BB over 27.1 innings.