Kenley Jansen
36-Year-Old
Day-To-Day
Injury Back
2023 Stats
W-L
3-6
ERA
3.63
WHIP
1.28
K
52
SV
29
2024 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
Will make appearance Tuesday
Red Sox manager Alex Cora said Monday that Jansen (back) will make an appearance Tuesday against the Rays, Christopher Smith of The Springfield Republican reports.
ANALYSIS
Jansen was scratched from a scheduled outing Monday with lower-back tightness, but he'll wind up being pushed back just one day. Cora noted that the closer is "running out of time" in order to be ready for Opening Day and can't afford any more hiccups. Jansen has been limited to just one appearance this spring, having previously dealt with a lat issue. After Tuesday's outing, Jansen is scheduled to pitch Thursday, Sunday and once more after that as he aims to be ready for the March 28 opener in Seattle, per Alex Speier of The Boston Globe.
Jansen was scratched from a scheduled outing Monday with lower-back tightness, but he'll wind up being pushed back just one day. Cora noted that the closer is "running out of time" in order to be ready for Opening Day and can't afford any more hiccups. Jansen has been limited to just one appearance this spring, having previously dealt with a lat issue. After Tuesday's outing, Jansen is scheduled to pitch Thursday, Sunday and once more after that as he aims to be ready for the March 28 opener in Seattle, per Alex Speier of The Boston Globe.
Pitching Stats
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2023
2022
2021
2020
2019
2018
2017
2023 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
12
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 2021
-3%
BAA vs RHP
2023
-27%
BAA vs LHP
BAA | K | BB | H | HR | ||||
---|---|---|---|---|---|---|---|---|
Since 2021vs Left | .192 | 102 | 35 | 59 | 11 | |||
Since 2021vs Right | .187 | 121 | 40 | 62 | 6 | |||
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 | |||
2021vs Left | .169 | 38 | 15 | 20 | 3 | |||
2021vs Right | .136 | 48 | 21 | 16 | 1 | |||
More Splits→ | View More Split Stats |
Home/Away Pitching Splits
Since 2021
-41%
ERA on Road
2023
-47%
ERA on Road
ERA | WHIP | IP | K/9 | BB/9 | |||||
---|---|---|---|---|---|---|---|---|---|
Since 2021Home | 3.72 | 1.13 | 92.0 | 12.3 | 3.3 | ||||
Since 2021Away | 2.21 | 1.07 | 85.2 | 10.2 | 4.3 | ||||
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 | ||||
2021Home | 3.22 | 0.94 | 36.1 | 12.9 | 3.0 | ||||
2021Away | 1.10 | 1.16 | 32.2 | 9.4 | 6.6 | ||||
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
3.06K/9
10.5BB/9
3.4HR/9
1.0Fastball
95.3 mphERA
3.63WHIP
1.28BABIP
.321GB/FB
0.40Left On Base
72.0%Exit Velocity
82.5 mphBarrels/BBE
4.9%Spin Rate
2585 rpmBalls Hit 95+ MPH
19.0%Swinging Strike
13.7%Advanced Pitching Stats
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Defensive Stats
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Stats Vs Today's Lineup
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Recent RotoWire Articles Featuring Kenley Jansen See More
Injuries and trades have shaken up the closer market, with Edwin Diaz claiming the top spot in Ryan Rufe's updated closer rankings.
Brad Johnson moves to pitching in the American League East, where in Baltimore, the Orioles signed pitching Ace Corbin Burnes to lead the team.
Ronald Acuna holds onto the top spot in the RotoWire Roundtable despite his knee scare, but there's plenty of movement behind him.
Past Fantasy Outlooks
2023
2022
2021
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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
Delayed by lower-back tightness
Jansen won't make his scheduled Grapefruit League appearance Monday against the Twins due to lower-back tightness, Christopher Smith of The Springfield Republican reports.
ANALYSIS
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Makes spring debut
Jansen (lat) allowed three runs on three hits and struck out one over two-thirds of an inning in Friday's spring game against Minnesota.
ANALYSIS
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On track to debut Friday
Jansen (lat) completed a bullpen session Tuesday and is still expected to make his spring debut Friday against the Twins, Ian Browne of MLB.comreports.
ANALYSIS
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Eyeing March 15 spring debut
Jansen (lat) said Wednesday that he's targeting the Red Sox's March 15 game against the Twins for his Grapefruit League debut, Ian Browne of MLB.com reports.
ANALYSIS
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Slated to throw live BP
Jansen (lat) is scheduled to throw live batting practice Wednesday, Jen McCaffrey of The Athletic reports.
ANALYSIS
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