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Kenley Jansen played 16 major-league seasons (2010-2025) as a P (933). Career totals and every year-by-year line below come from the SABR/Lahman database (CC BY-SA), covering 1871-2025.
Showing 6 season lines
| Year | Age | Team | G | AB | R | H | HR | RBI | SB | BB | SO | AVG | OPS | OPS+ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2010 | 23 | LAN | 26 | 1 | 1 | 1 | 0 | 0 | 0 | 1 | 0 | 1.000 | 2.000 | 459 |
| 2013 | 26 | LAN | 75 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .000 | .000 | -100 |
| 2014 | 27 | LAN | 68 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | .000 | .000 | -100 |
| 2017 | 30 | LAN | 65 | 4 | 0 | 2 | 0 | 1 | 0 | 0 | 0 | .500 | 1.250 | 231 |
| 2019 | 32 | LAN | 62 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | .000 | .000 | -100 |
| 2021 | 34 | LAN | 69 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | .000 | .000 | -100 |
| Year | Age | Team | G | GS | W | L | SV | IP | SO | BB | ERA | ERA+ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2010 | 23 | LAN | 25 | 0 | 1 | 0 | 4 | 27 | 41 | 15 | 0.67 | 602 |
| 2011 | 24 | LAN | 51 | 0 | 2 | 1 | 5 | 53.2 | 96 | 26 | 2.85 | 134 |
| 2012 | 25 | LAN | 65 | 0 | 5 | 3 | 25 | 65 | 99 | 22 | 2.35 | 167 |
| 2013 | 26 | LAN | 75 | 0 | 4 | 3 | 28 | 76.2 | 111 | 18 | 1.88 | 199 |
| 2014 | 27 | LAN | 68 | 0 | 2 | 3 | 44 | 65.1 | 101 | 19 | 2.76 | 133 |
| 2015 | 28 | LAN | 54 | 0 | 2 | 1 | 36 | 52.1 | 80 | 8 | 2.41 | 162 |
| 2016 | 29 | LAN | 71 | 0 | 3 | 2 | 47 | 68.2 | 104 | 11 | 1.83 | 227 |
| 2017 | 30 | LAN | 65 | 0 | 5 | 0 | 41 | 68.1 | 109 | 7 | 1.32 | 329 |
| 2018 | 31 | LAN | 69 | 0 | 1 | 5 | 38 | 71.2 | 82 | 17 | 3.01 | 134 |
| 2019 | 32 | LAN | 62 | 0 | 5 | 3 | 33 | 63 | 80 | 16 | 3.71 | 118 |
| 2020 | 33 | LAN | 27 | 0 | 3 | 1 | 11 | 24.1 | 33 | 9 | 3.33 | 134 |
| 2021 | 34 | LAN | 69 | 0 | 4 | 4 | 38 | 69 | 86 | 36 | 2.22 | 189 |
| 2022 | 35 | ATL | 65 | 0 | 5 | 2 | 41 | 64 | 85 | 22 | 3.38 | 120 |
| 2023 | 36 | BOS | 51 | 0 | 3 | 6 | 29 | 44.2 | 52 | 17 | 3.63 | 118 |
| 2024 | 37 | BOS | 54 | 0 | 4 | 2 | 27 | 54.2 | 62 | 20 | 3.29 | 122 |
| 2025 | 38 | LAA | 62 | 0 | 5 | 4 | 29 | 59 | 57 | 19 | 2.59 | 158 |
| Year | Pos | G | GS | PO | A | E | DP |
|---|---|---|---|---|---|---|---|
| 2010 | P | 25 | 0 | 1 | 1 | 0 | 0 |
| 2011 | P | 51 | 0 | 2 | 3 | 0 | 1 |
| 2012 | P | 65 | 0 | 1 | 5 | 1 | 0 |
| 2013 | P | 75 | 0 | 3 | 1 | 0 | 0 |
| 2014 | P | 68 | 0 | 6 | 2 | 1 | 1 |
| 2015 | P | 54 | 0 | 0 | 2 | 1 | 0 |
| 2016 | P | 71 | 0 | 3 | 1 | 1 | 0 |
| 2017 | P | 65 | 0 | 4 | 1 | 0 | 0 |
| 2018 | P | 69 | 0 | 1 | 4 | 0 | 1 |
| 2019 | P | 62 | 0 | 7 | 2 | 1 | 0 |
| 2020 | P | 27 | 0 | 1 | 0 | 0 | 0 |
| 2021 | P | 69 | 0 | 4 | 2 | 0 | 0 |
| 2022 | P | 65 | 0 | 1 | 3 | 0 | 0 |
| 2023 | P | 51 | 0 | 1 | 3 | 0 | 0 |
| 2024 | P | 54 | 0 | 1 | 1 | 0 | 0 |
| 2025 | P | 62 | 0 | 1 | 1 | 1 | 0 |
Team codes are the source codes (e.g. NYN for the New York Mets, BS1 for the 1875 Boston club). OPS+ is league-season normalized, not park-adjusted; unrecorded source values (such as RBI in the earliest recorded seasons) are absent, never zero-filled.
Kenley Jansen won: TSN All-Star 2016 (NL), TSN All-Star 2017 (NL).
MVP, Cy Young and Rookie of the Year voting history (3 ballot finishes, 0 wins). Full year pages: 2017, 2011.
| Year | Award | Lg | Rank | Points | First-place votes |
|---|---|---|---|---|---|
| 2011 | Rookie of the Year | NL | 8 | 2 / 160 | 0 |
| 2017 | Cy Young Award | NL | 5 | 22 / 210 | 0 |
| 2017 | Most Valuable Player | NL | 15 | 8 / 420 | 0 |
Kenley Jansen ranks on 2 all-time single-season position leaderboards (1871-2025, league-season-normalized OPS+ / ERA+).
| Rank | Board | Year | Stat |
|---|---|---|---|
| #29 | closers | 2017 | 329 ERA+ |
| #44 | relief pitchers | 2017 | 329 ERA+ |
Kenley Jansen is a playable Legends Deck card, rated from real Statcast data and refreshed nightly: view the Kenley Jansen card.
| Date | Type | From | To | Details |
|---|---|---|---|---|
| Dec 17, 2025 | Signed as free agent | — | Detroit Tigers | Detroit Tigers signed free agent RHP Kenley Jansen. |
| Feb 15, 2025 | Signed as free agent | — | Los Angeles Angels | Los Angeles Angels signed free agent RHP Kenley Jansen. |
| Dec 13, 2022 | Signed as free agent | — | Boston Red Sox | Boston Red Sox signed free agent RHP Kenley Jansen. |
| Mar 19, 2022 | Signed as free agent | — | Atlanta Braves | Atlanta Braves signed free agent RHP Kenley Jansen. |
| Jan 10, 2017 | Signed as free agent | — | Los Angeles Dodgers | Los Angeles Dodgers signed free agent RHP Kenley Jansen. |
From MLB’s official StatsAPI transactions feed (2011 to the current season, trades/signings/releases involving major-league clubs). Browse the full archive.
Every career total and season line is computed from the SABR / Sean Lahman baseball database (2025 edition, CC BY-SA 3.0), the same source behind our historical position leaderboards. Rate stats use league-season normalization only (OPS+ and ERA+ as marked, never park-adjusted); unrecorded early-era values stay absent rather than being invented. Career totals sum only what the source records.
Award winners and MVP / Cy Young / Rookie of the Year voting history come from the same database; the year pages live under MLB award voting history. Official transactions (2011 to the current season) come from the MLB StatsAPI feed on our transactions archive.