2023 Stats
W-L
3-6
ERA
3.63
WHIP
1.28
K
52
SV
29
Rest-of-Season Projections
2023 Fantasy Outlook
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. Read Past Outlooks

Returns from COVID IL
The Red Sox reinstated Jansen from the COVID-19 injured list Saturday, Gabrielle Starr of the Boston Herald reports.
ANALYSIS
Jansen tested positive for COVID-19 on Sept. 13 and will now return to Boston's bullpen after a 10-day absence, sending Zack Weiss back to Triple-A Worcester. The 35-year-old closer has allowed five runs in three innings across his last five appearances, and he hasn't recorded a save since Aug. 20.
Jansen tested positive for COVID-19 on Sept. 13 and will now return to Boston's bullpen after a 10-day absence, sending Zack Weiss back to Triple-A Worcester. The 35-year-old closer has allowed five runs in three innings across his last five appearances, and he hasn't recorded a save since Aug. 20.
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 | 39 | 62 | 6 | |||
2023vs Left | .198 | 25 | 8 | 16 | 3 | |||
2023vs Right | .273 | 27 | 8 | 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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Past Fantasy Outlooks
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
2012
2011
Jansen is clearly no longer the lockdown force who averaged 100 strikeouts a year from 2011-2017, but he can still get the job done in the ninth innings, saving 38 in 43 tries last season. Jansen began throwing fewer cutters and more sinkers in 2020, then continued it last year. He was able to induce more groundballs, but he also recorded a 12.9% walk rate, the highest mark since his rookie season. His 30.9% strikeout rate was down from his salad days, but more than sufficient to remain one of the more dominating closers. Jansen's 288 saves since 2014 are by far the most in the league so it's likely he will displace Will Smith as Atlanta's closer after inking a one-year, $16 million contract in March.
More Fantasy News

Return could be pushed to next week
Jansen (illness) has yet to be cleared and now might not return from the COVID-19 injured list until next week, Pete Abraham of The Boston Globe reports.
ANALYSIS
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Likely to be activated Wednesday
Jansen (illness) is expected to be activated from the COVID-19 injured list Wednesday, Jen McCaffrey of The Athletic reports.
ANALYSIS
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Out with COVID
Jansen was placed on the COVID-19 injured list Wednesday after testing positive for the virus, Chris Cotillo of The Springfield Republican reports.
ANALYSIS
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Battling illness
Jansen was taken out of his appearance in the ninth inning of Tuesday's second game of a doubleheader against the Yankees after experiencing symptoms of fatigue and illness, Ian Browne of MLB.com reports.
ANALYSIS
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Exits with trainer
Jansen was removed from Tuesday's nightcap against the Yankees with an apparent injury, Gary Phillips of the New York Daily News reports.
ANALYSIS
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