Kenley Geronimo Jansen (born September 30, 1987) is a Curaçaoan professional baseball pitcher for the Los Angeles Angels of Major League Baseball (MLB). He has previously played in MLB for the Los Angeles Dodgers, Atlanta Braves, and Boston Red Sox.
He converted from a catcher to a relief pitcher in the minor leagues, and made his major league debut in 2010. Jansen has served as the Dodgers' closer since 2012, and led the National League (NL) in saves in 2017. He is a three-time MLB All-Star and two-time NL Reliever of the Year (2016, 2017). In 2019, Jansen became the 30th pitcher to reach 300 career saves.
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| SO/BB | MLB | 2025 | 3.00 |
| SO9 | MLB | 2025 | 8.7 |
| BB9 | MLB | 2025 | 2.9 |
| HR9 | MLB | 2025 | 1.2 |
| H9 | MLB | 2025 | 5.6 |
| WHIP | MLB | 2025 | 0.949 |
| Fielding Independent Pitching | MLB | 2025 | 3.98 |
| ERA+ | MLB | 2025 | 165 |
| Batters Faced | MLB | 2025 | 234 |
| Wild Pitches | MLB | 2025 | 0 |
| Balks | MLB | 2025 | 3 |
| Home Runs Allowed | MLB | 2025 | 8 |
| Earned Runs Allowed | MLB | 2025 | 17 |
| Runs Allowed | MLB | 2025 | 18 |
| Hits Allowed | MLB | 2025 | 37 |
| Innings Pitched | MLB | 2025 | 59.0 |
| Saves | MLB | 2025 | 29 |
| Shutouts | MLB | 2025 | 0 |
| Complete Games | MLB | 2025 | 0 |
| Games Finished | MLB | 2025 | 47 |
| Games Started | MLB | 2025 | 0 |
| Games Pitched | MLB | 2025 | 62 |
| ERA | MLB | 2025 | 2.59 |
| Win-Loss Percentage | MLB | 2025 | .556 |
| Loss | MLB | 2025 | 4 |
| Wins | MLB | 2025 | 5 |
| Wins Above Replacement for Pitchers | MLB | 2025 | 2.4 |
| Positions Played | MLB | 2025 | 1 |
| Intentional Bases on Balls | MLB | 2025 | 0 |
| Sacrifice Flies | MLB | 2025 | 0 |
| Sacrifice Hits | MLB | 2025 | 0 |
| Times Hit by a Pitch | MLB | 2025 | 0 |
| GIDP | MLB | 2025 | 0 |
| Total Bases | MLB | 2025 | 0 |
| Strikeouts | MLB | 2025 | 0 |
| Bases on Balls/Walks | MLB | 2025 | 0 |
| Caught Stealing | MLB | 2025 | 0 |
| Stolen Bases | MLB | 2025 | 0 |
| Runs Batted In | MLB | 2025 | 0 |
| Home Runs | MLB | 2025 | 0 |
| Triples | MLB | 2025 | 0 |
| Doubles | MLB | 2025 | 0 |
| Hits | MLB | 2025 | 0 |
| Runs Scored | MLB | 2025 | 0 |
| At Bats | MLB | 2025 | 0 |
| Plate Appearances | MLB | 2025 | 0 |
| Games Played | MLB | 2025 | 1 |
| Wins Above Replacement for position players | MLB | 2025 | 0.0 |
|
|
| SO/BB | MLB | 2024 | 3.10 |
| SO9 | MLB | 2024 | 10.2 |
| BB9 | MLB | 2024 | 3.3 |
| HR9 | MLB | 2024 | 0.7 |
| H9 | MLB | 2024 | 6.3 |
| WHIP | MLB | 2024 | 1.061 |
| Fielding Independent Pitching | MLB | 2024 | 3.00 |
| ERA+ | MLB | 2024 | 127 |
| Batters Faced | MLB | 2024 | 218 |
| Wild Pitches | MLB | 2024 | 2 |
| Balks | MLB | 2024 | 2 |
| Home Runs Allowed | MLB | 2024 | 4 |
| Earned Runs Allowed | MLB | 2024 | 20 |
| Runs Allowed | MLB | 2024 | 20 |
| Hits Allowed | MLB | 2024 | 38 |
| Innings Pitched | MLB | 2024 | 54.2 |
| Saves | MLB | 2024 | 27 |
| Shutouts | MLB | 2024 | 0 |
| Complete Games | MLB | 2024 | 0 |
| Games Finished | MLB | 2024 | 38 |
| Games Started | MLB | 2024 | 0 |
| Games Pitched | MLB | 2024 | 54 |
| ERA | MLB | 2024 | 3.29 |
| Win-Loss Percentage | MLB | 2024 | .667 |
| Loss | MLB | 2024 | 2 |
| Wins | MLB | 2024 | 4 |
| Wins Above Replacement for Pitchers | MLB | 2024 | 1.3 |
| Positions Played | MLB | 2024 | 1 |
| Intentional Bases on Balls | MLB | 2024 | 0 |
| Sacrifice Flies | MLB | 2024 | 0 |
| Sacrifice Hits | MLB | 2024 | 0 |
| Times Hit by a Pitch | MLB | 2024 | 0 |
| GIDP | MLB | 2024 | 0 |
| Total Bases | MLB | 2024 | 0 |
| Strikeouts | MLB | 2024 | 0 |
| Bases on Balls/Walks | MLB | 2024 | 0 |
| Caught Stealing | MLB | 2024 | 0 |
| Stolen Bases | MLB | 2024 | 0 |
| Runs Batted In | MLB | 2024 | 0 |
| Home Runs | MLB | 2024 | 0 |
| Triples | MLB | 2024 | 0 |
| Doubles | MLB | 2024 | 0 |
| Hits | MLB | 2024 | 0 |
| Runs Scored | MLB | 2024 | 0 |
| At Bats | MLB | 2024 | 0 |
| Plate Appearances | MLB | 2024 | 0 |
| Games Played | MLB | 2024 | 1 |
| Wins Above Replacement for position players | MLB | 2024 | 0.0 |
|
|
| SO/BB | MLB | 2023 | 3.06 |
| SO9 | MLB | 2023 | 10.5 |
| BB9 | MLB | 2023 | 3.4 |
| HR9 | MLB | 2023 | 1.0 |
| H9 | MLB | 2023 | 8.1 |
| WHIP | MLB | 2023 | 1.276 |
| Fielding Independent Pitching | MLB | 2023 | 3.66 |
| ERA+ | MLB | 2023 | 126 |
| Batters Faced | MLB | 2023 | 188 |
| Wild Pitches | MLB | 2023 | 1 |
| Balks | MLB | 2023 | 2 |
| Home Runs Allowed | MLB | 2023 | 5 |
| Earned Runs Allowed | MLB | 2023 | 18 |
| Runs Allowed | MLB | 2023 | 21 |
| Hits Allowed | MLB | 2023 | 40 |
| Innings Pitched | MLB | 2023 | 44.2 |
| Saves | MLB | 2023 | 29 |
| Shutouts | MLB | 2023 | 0 |
| Complete Games | MLB | 2023 | 0 |
| Games Finished | MLB | 2023 | 42 |
| Games Started | MLB | 2023 | 0 |
| Games Pitched | MLB | 2023 | 51 |
| ERA | MLB | 2023 | 3.63 |
| Win-Loss Percentage | MLB | 2023 | .333 |
| Loss | MLB | 2023 | 6 |
| Wins | MLB | 2023 | 3 |
| Wins Above Replacement for Pitchers | MLB | 2023 | 0.7 |
| Positions Played | MLB | 2023 | 1 |
| Intentional Bases on Balls | MLB | 2023 | 0 |
| Sacrifice Flies | MLB | 2023 | 0 |
| Sacrifice Hits | MLB | 2023 | 0 |
| Times Hit by a Pitch | MLB | 2023 | 0 |
| GIDP | MLB | 2023 | 0 |
| Total Bases | MLB | 2023 | 0 |
| Strikeouts | MLB | 2023 | 0 |
| Bases on Balls/Walks | MLB | 2023 | 0 |
| Caught Stealing | MLB | 2023 | 0 |
| Stolen Bases | MLB | 2023 | 0 |
| Runs Batted In | MLB | 2023 | 0 |
| Home Runs | MLB | 2023 | 0 |
| Triples | MLB | 2023 | 0 |
| Doubles | MLB | 2023 | 0 |
| Hits | MLB | 2023 | 0 |
| Runs Scored | MLB | 2023 | 0 |
| At Bats | MLB | 2023 | 0 |
| Plate Appearances | MLB | 2023 | 0 |
| Games Played | MLB | 2023 | 1 |
| Wins Above Replacement for position players | MLB | 2023 | 0.0 |
|
|
| Positions Played | MLB | 2021 | 1 |
| Intentional Bases on Balls | MLB | 2021 | 0 |
| Sacrifice Flies | MLB | 2021 | 0 |
| Sacrifice Hits | MLB | 2021 | 0 |
| Times Hit by a Pitch | MLB | 2021 | 0 |
| GIDP | MLB | 2021 | 0 |
| Total Bases | MLB | 2021 | 0 |
| Rbat+ | MLB | 2021 | -133 |
| rOBA | MLB | 2021 | .000 |
| OPS+ | MLB | 2021 | -100 |
| OPS | MLB | 2021 | .000 |
| SLG | MLB | 2021 | .000 |
| OBP | MLB | 2021 | .000 |
| Hits/At Bats | MLB | 2021 | .000 |
| Strikeouts | MLB | 2021 | 1 |
| Bases on Balls/Walks | MLB | 2021 | 0 |
| Caught Stealing | MLB | 2021 | 0 |
| Stolen Bases | MLB | 2021 | 0 |
| Runs Batted In | MLB | 2021 | 0 |
| Home Runs | MLB | 2021 | 0 |
| Triples | MLB | 2021 | 0 |
| Doubles | MLB | 2021 | 0 |
| Hits | MLB | 2021 | 0 |
| Runs Scored | MLB | 2021 | 0 |
| At Bats | MLB | 2021 | 1 |
| Plate Appearances | MLB | 2021 | 1 |
| Games Played | MLB | 2021 | 66 |
| Wins Above Replacement for position players | MLB | 2021 | 0.0 |
|
|
| Positions Played | MLB | 2019 | 1 |
| Intentional Bases on Balls | MLB | 2019 | 0 |
| Sacrifice Flies | MLB | 2019 | 0 |
| Sacrifice Hits | MLB | 2019 | 0 |
| Times Hit by a Pitch | MLB | 2019 | 0 |
| GIDP | MLB | 2019 | 0 |
| Total Bases | MLB | 2019 | 0 |
| Rbat+ | MLB | 2019 | -142 |
| rOBA | MLB | 2019 | .000 |
| OPS+ | MLB | 2019 | -100 |
| OPS | MLB | 2019 | .000 |
| SLG | MLB | 2019 | .000 |
| OBP | MLB | 2019 | .000 |
| Hits/At Bats | MLB | 2019 | .000 |
| Strikeouts | MLB | 2019 | 1 |
| Bases on Balls/Walks | MLB | 2019 | 0 |
| Caught Stealing | MLB | 2019 | 0 |
| Stolen Bases | MLB | 2019 | 0 |
| Runs Batted In | MLB | 2019 | 0 |
| Home Runs | MLB | 2019 | 0 |
| Triples | MLB | 2019 | 0 |
| Doubles | MLB | 2019 | 0 |
| Hits | MLB | 2019 | 0 |
| Runs Scored | MLB | 2019 | 0 |
| At Bats | MLB | 2019 | 1 |
| Plate Appearances | MLB | 2019 | 1 |
| Games Played | MLB | 2019 | 59 |
| Wins Above Replacement for position players | MLB | 2019 | 0.0 |
|
|
| Positions Played | MLB | 2018 | 1 |
| Intentional Bases on Balls | MLB | 2018 | 0 |
| Sacrifice Flies | MLB | 2018 | 0 |
| Sacrifice Hits | MLB | 2018 | 0 |
| Times Hit by a Pitch | MLB | 2018 | 0 |
| GIDP | MLB | 2018 | 0 |
| Total Bases | MLB | 2018 | 0 |
| Strikeouts | MLB | 2018 | 0 |
| Bases on Balls/Walks | MLB | 2018 | 0 |
| Caught Stealing | MLB | 2018 | 0 |
| Stolen Bases | MLB | 2018 | 0 |
| Runs Batted In | MLB | 2018 | 0 |
| Home Runs | MLB | 2018 | 0 |
| Triples | MLB | 2018 | 0 |
| Doubles | MLB | 2018 | 0 |
| Hits | MLB | 2018 | 0 |
| Runs Scored | MLB | 2018 | 0 |
| At Bats | MLB | 2018 | 0 |
| Plate Appearances | MLB | 2018 | 0 |
| Games Played | MLB | 2018 | 65 |
| Wins Above Replacement for position players | MLB | 2018 | 0.0 |
|
|
| Positions Played | MLB | 2017 | 1 |
| Intentional Bases on Balls | MLB | 2017 | 0 |
| Sacrifice Flies | MLB | 2017 | 0 |
| Sacrifice Hits | MLB | 2017 | 0 |
| Times Hit by a Pitch | MLB | 2017 | 0 |
| GIDP | MLB | 2017 | 1 |
| Total Bases | MLB | 2017 | 3 |
| Rbat+ | MLB | 2017 | 230 |
| rOBA | MLB | 2017 | .509 |
| OPS+ | MLB | 2017 | 227 |
| OPS | MLB | 2017 | 1.250 |
| SLG | MLB | 2017 | .750 |
| OBP | MLB | 2017 | .500 |
| Hits/At Bats | MLB | 2017 | .500 |
| Strikeouts | MLB | 2017 | 0 |
| Bases on Balls/Walks | MLB | 2017 | 0 |
| Caught Stealing | MLB | 2017 | 0 |
| Stolen Bases | MLB | 2017 | 0 |
| Runs Batted In | MLB | 2017 | 1 |
| Home Runs | MLB | 2017 | 0 |
| Triples | MLB | 2017 | 0 |
| Doubles | MLB | 2017 | 1 |
| Hits | MLB | 2017 | 2 |
| Runs Scored | MLB | 2017 | 0 |
| At Bats | MLB | 2017 | 4 |
| Plate Appearances | MLB | 2017 | 4 |
| Games Played | MLB | 2017 | 59 |
| Wins Above Replacement for position players | MLB | 2017 | 0.1 |
|
|
| Positions Played | MLB | 2016 | 1 |
| Intentional Bases on Balls | MLB | 2016 | 0 |
| Sacrifice Flies | MLB | 2016 | 0 |
| Sacrifice Hits | MLB | 2016 | 0 |
| Times Hit by a Pitch | MLB | 2016 | 0 |
| GIDP | MLB | 2016 | 0 |
| Total Bases | MLB | 2016 | 0 |
| Strikeouts | MLB | 2016 | 0 |
| Bases on Balls/Walks | MLB | 2016 | 0 |
| Caught Stealing | MLB | 2016 | 0 |
| Stolen Bases | MLB | 2016 | 0 |
| Runs Batted In | MLB | 2016 | 0 |
| Home Runs | MLB | 2016 | 0 |
| Triples | MLB | 2016 | 0 |
| Doubles | MLB | 2016 | 0 |
| Hits | MLB | 2016 | 0 |
| Runs Scored | MLB | 2016 | 0 |
| At Bats | MLB | 2016 | 0 |
| Plate Appearances | MLB | 2016 | 0 |
| Games Played | MLB | 2016 | 68 |
| Wins Above Replacement for position players | MLB | 2016 | 0.0 |
|
|
| Positions Played | MLB | 2015 | 1 |
| Intentional Bases on Balls | MLB | 2015 | 0 |
| Sacrifice Flies | MLB | 2015 | 0 |
| Sacrifice Hits | MLB | 2015 | 0 |
| Times Hit by a Pitch | MLB | 2015 | 0 |
| GIDP | MLB | 2015 | 0 |
| Total Bases | MLB | 2015 | 0 |
| Strikeouts | MLB | 2015 | 0 |
| Bases on Balls/Walks | MLB | 2015 | 0 |
| Caught Stealing | MLB | 2015 | 0 |
| Stolen Bases | MLB | 2015 | 0 |
| Runs Batted In | MLB | 2015 | 0 |
| Home Runs | MLB | 2015 | 0 |
| Triples | MLB | 2015 | 0 |
| Doubles | MLB | 2015 | 0 |
| Hits | MLB | 2015 | 0 |
| Runs Scored | MLB | 2015 | 0 |
| At Bats | MLB | 2015 | 0 |
| Plate Appearances | MLB | 2015 | 0 |
| Games Played | MLB | 2015 | 51 |
| Wins Above Replacement for position players | MLB | 2015 | 0.0 |
|
|
| Positions Played | MLB | 2014 | 1 |
| Intentional Bases on Balls | MLB | 2014 | 0 |
| Sacrifice Flies | MLB | 2014 | 0 |
| Sacrifice Hits | MLB | 2014 | 0 |
| Times Hit by a Pitch | MLB | 2014 | 0 |
| GIDP | MLB | 2014 | 0 |
| Total Bases | MLB | 2014 | 0 |
| Rbat+ | MLB | 2014 | -140 |
| rOBA | MLB | 2014 | .000 |
| OPS+ | MLB | 2014 | -100 |
| OPS | MLB | 2014 | .000 |
| SLG | MLB | 2014 | .000 |
| OBP | MLB | 2014 | .000 |
| Hits/At Bats | MLB | 2014 | .000 |
| Strikeouts | MLB | 2014 | 1 |
| Bases on Balls/Walks | MLB | 2014 | 0 |
| Caught Stealing | MLB | 2014 | 0 |
| Stolen Bases | MLB | 2014 | 0 |
| Runs Batted In | MLB | 2014 | 0 |
| Home Runs | MLB | 2014 | 0 |
| Triples | MLB | 2014 | 0 |
| Doubles | MLB | 2014 | 0 |
| Hits | MLB | 2014 | 0 |
| Runs Scored | MLB | 2014 | 0 |
| At Bats | MLB | 2014 | 1 |
| Plate Appearances | MLB | 2014 | 1 |
| Games Played | MLB | 2014 | 64 |
| Wins Above Replacement for position players | MLB | 2014 | 0.0 |
|
|
| Positions Played | MLB | 2013 | 1 |
| Intentional Bases on Balls | MLB | 2013 | 0 |
| Sacrifice Flies | MLB | 2013 | 0 |
| Sacrifice Hits | MLB | 2013 | 0 |
| Times Hit by a Pitch | MLB | 2013 | 0 |
| GIDP | MLB | 2013 | 0 |
| Total Bases | MLB | 2013 | 0 |
| Rbat+ | MLB | 2013 | -150 |
| rOBA | MLB | 2013 | .000 |
| OPS+ | MLB | 2013 | -100 |
| OPS | MLB | 2013 | .000 |
| SLG | MLB | 2013 | .000 |
| OBP | MLB | 2013 | .000 |
| Hits/At Bats | MLB | 2013 | .000 |
| Strikeouts | MLB | 2013 | 0 |
| Bases on Balls/Walks | MLB | 2013 | 0 |
| Caught Stealing | MLB | 2013 | 0 |
| Stolen Bases | MLB | 2013 | 0 |
| Runs Batted In | MLB | 2013 | 0 |
| Home Runs | MLB | 2013 | 0 |
| Triples | MLB | 2013 | 0 |
| Doubles | MLB | 2013 | 0 |
| Hits | MLB | 2013 | 0 |
| Runs Scored | MLB | 2013 | 0 |
| At Bats | MLB | 2013 | 1 |
| Plate Appearances | MLB | 2013 | 1 |
| Games Played | MLB | 2013 | 70 |
| Wins Above Replacement for position players | MLB | 2013 | 0.0 |
|
|
| Positions Played | MLB | 2012 | 1 |
| Intentional Bases on Balls | MLB | 2012 | 0 |
| Sacrifice Flies | MLB | 2012 | 0 |
| Sacrifice Hits | MLB | 2012 | 0 |
| Times Hit by a Pitch | MLB | 2012 | 0 |
| GIDP | MLB | 2012 | 0 |
| Total Bases | MLB | 2012 | 0 |
| Strikeouts | MLB | 2012 | 0 |
| Bases on Balls/Walks | MLB | 2012 | 0 |
| Caught Stealing | MLB | 2012 | 0 |
| Stolen Bases | MLB | 2012 | 0 |
| Runs Batted In | MLB | 2012 | 0 |
| Home Runs | MLB | 2012 | 0 |
| Triples | MLB | 2012 | 0 |
| Doubles | MLB | 2012 | 0 |
| Hits | MLB | 2012 | 0 |
| Runs Scored | MLB | 2012 | 0 |
| At Bats | MLB | 2012 | 0 |
| Plate Appearances | MLB | 2012 | 0 |
| Games Played | MLB | 2012 | 64 |
| Wins Above Replacement for position players | MLB | 2012 | 0.0 |
|
|
| Positions Played | MLB | 2011 | 1/H |
| Intentional Bases on Balls | MLB | 2011 | 0 |
| Sacrifice Flies | MLB | 2011 | 0 |
| Sacrifice Hits | MLB | 2011 | 0 |
| Times Hit by a Pitch | MLB | 2011 | 0 |
| GIDP | MLB | 2011 | 0 |
| Total Bases | MLB | 2011 | 1 |
| Rbat+ | MLB | 2011 | 450 |
| rOBA | MLB | 2011 | .808 |
| OPS+ | MLB | 2011 | 453 |
| OPS | MLB | 2011 | 2.000 |
| SLG | MLB | 2011 | 1.000 |
| OBP | MLB | 2011 | 1.000 |
| Hits/At Bats | MLB | 2011 | 1.000 |
| Strikeouts | MLB | 2011 | 0 |
| Bases on Balls/Walks | MLB | 2011 | 1 |
| Caught Stealing | MLB | 2011 | 0 |
| Stolen Bases | MLB | 2011 | 0 |
| Runs Batted In | MLB | 2011 | 0 |
| Home Runs | MLB | 2011 | 0 |
| Triples | MLB | 2011 | 0 |
| Doubles | MLB | 2011 | 0 |
| Hits | MLB | 2011 | 1 |
| Runs Scored | MLB | 2011 | 1 |
| At Bats | MLB | 2011 | 1 |
| Plate Appearances | MLB | 2011 | 2 |
| Games Played | MLB | 2011 | 26 |
| Wins Above Replacement for position players | MLB | 2011 | 0.1 |
|
|
| Positions Played | MLB | 2010 | 1/H |
| Intentional Bases on Balls | MLB | 2010 | 0 |
| Sacrifice Flies | MLB | 2010 | 0 |
| Sacrifice Hits | MLB | 2010 | 0 |
| Times Hit by a Pitch | MLB | 2010 | 0 |
| GIDP | MLB | 2010 | 0 |
| Total Bases | MLB | 2010 | 1 |
| Rbat+ | MLB | 2010 | 450 |
| rOBA | MLB | 2010 | .808 |
| OPS+ | MLB | 2010 | 453 |
| OPS | MLB | 2010 | 2.000 |
| SLG | MLB | 2010 | 1.000 |
| OBP | MLB | 2010 | 1.000 |
| Hits/At Bats | MLB | 2010 | 1.000 |
| Strikeouts | MLB | 2010 | 0 |
| Bases on Balls/Walks | MLB | 2010 | 1 |
| Caught Stealing | MLB | 2010 | 0 |
| Stolen Bases | MLB | 2010 | 0 |
| Runs Batted In | MLB | 2010 | 0 |
| Home Runs | MLB | 2010 | 0 |
| Triples | MLB | 2010 | 0 |
| Doubles | MLB | 2010 | 0 |
| Hits | MLB | 2010 | 1 |
| Runs Scored | MLB | 2010 | 1 |
| At Bats | MLB | 2010 | 1 |
| Plate Appearances | MLB | 2010 | 2 |
| Games Played | MLB | 2010 | 26 |
| Wins Above Replacement for position players | MLB | 2010 | 0.1 |
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