Age: 38, 265 lbs, 6'5" Born: 9/30/1987, Willemstad, Curacao Sal: N/A PLAYER NEWS REPORT 25 daysPOBO won't commit to closer. Tigers president of baseball operations Scott Harris stopped short of naming Jansen the team's closer Wednesday, saying that there are "at least three or four closer types" on the roster.
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| 2025 | DET | 62 | 0 | 59.0 | 2.59 | 5 | 4 | 0 | 29 | 37 | 5 | 1 | 8 | 57 | 1 | 19 | 0 | 3 | 18 | 17 | 0 | 0.95 | 8.69 | 112.0 | 1.8 |
| 2024 | BOS | 54 | 0 | 54.7 | 3.29 | 4 | 2 | 0 | 27 | 38 | 9 | 0 | 4 | 62 | 1 | 20 | 2 | 2 | 20 | 20 | 0 | 1.06 | 10.21 | 101.0 | 1.9 |
| 2023 | BOS | 51 | 0 | 44.7 | 3.63 | 3 | 6 | 0 | 29 | 40 | 9 | 0 | 5 | 52 | 2 | 17 | 1 | 2 | 21 | 18 | 0 | 1.28 | 10.48 | 102.0 | 2.0 |
| 2022 | BOS | 65 | 0 | 64.0 | 3.38 | 5 | 2 | 0 | 41 | 45 | 6 | 3 | 8 | 85 | 2 | 22 | 1 | 1 | 25 | 24 | 0 | 1.05 | 11.95 | 148.0 | 2.3 |
| 2021 | LAD | 69 | 0 | 69.0 | 2.22 | 4 | 4 | 0 | 38 | 36 | 7 | 0 | 4 | 86 | 2 | 36 | 4 | 2 | 21 | 17 | 0 | 1.04 | 11.22 | 134.0 | 1.9 |
| 2020 | LAD | 27 | 0 | 24.3 | 3.33 | 3 | 1 | 0 | 11 | 19 | 0 | 0 | 2 | 33 | 3 | 9 | 0 | 0 | 11 | 9 | 0 | 1.15 | 12.21 | 48.0 | 1.8 |
| 2019 | LAD | 62 | 0 | 63.0 | 3.71 | 5 | 3 | 0 | 33 | 51 | 0 | 0 | 9 | 80 | 4 | 16 | 2 | 0 | 28 | 26 | 0 | 1.06 | 11.43 | 124.0 | 2.0 |
| 2018 | LAD | 69 | 0 | 71.7 | 3.01 | 1 | 5 | 0 | 38 | 54 | 0 | 0 | 13 | 82 | 2 | 17 | 0 | 0 | 28 | 24 | 0 | 0.99 | 10.30 | 119.0 | 1.7 |
| 2017 | LAD | 65 | 0 | 68.3 | 1.32 | 5 | 0 | 0 | 41 | 44 | 0 | 0 | 5 | 109 | 2 | 7 | 2 | 0 | 11 | 10 | 0 | 0.75 | 14.36 | 148.0 | 2.3 |
| 2016 | LAD | 72 | 0 | 68.7 | 1.83 | 3 | 2 | 0 | 47 | 35 | 0 | 0 | 4 | 104 | 2 | 11 | 1 | 0 | 14 | 14 | 0 | 0.67 | 13.63 | 156.0 | 2.2 |
| 2015 | LAD | 54 | 0 | 52.3 | 2.41 | 2 | 1 | 0 | 36 | 33 | 0 | 0 | 6 | 80 | 2 | 8 | 0 | 0 | 14 | 14 | 0 | 0.78 | 13.76 | 118.0 | 2.2 |
| 2014 | LAD | 68 | 0 | 65.3 | 2.76 | 2 | 3 | 0 | 44 | 55 | 0 | 0 | 5 | 101 | 0 | 19 | 2 | 0 | 20 | 20 | 0 | 1.13 | 13.91 | 142.0 | 2.1 |
| 2013 | LAD | 75 | 0 | 76.7 | 1.88 | 4 | 3 | 0 | 28 | 48 | 0 | 0 | 6 | 111 | 3 | 18 | 2 | 0 | 16 | 16 | 0 | 0.86 | 13.03 | 104.0 | 1.4 |
| 2012 | LAD | 65 | 0 | 65.0 | 2.35 | 5 | 3 | 0 | 25 | 33 | 0 | 0 | 6 | 0 | 3 | 22 | 3 | 0 | 18 | 17 | 0 | 0.85 | 0.00 | 100.0 | 1.5 |
| 2011 | LAD | 51 | 0 | 53.7 | 2.85 | 2 | 1 | 0 | 5 | 30 | 0 | 0 | 3 | 96 | 2 | 26 | 0 | 0 | 17 | 17 | 0 | 1.04 | 16.10 | 25.0 | 0.5 |
| 2010 | LAD | 26 | 0 | 27.0 | 0.67 | 1 | 0 | 0 | 4 | 12 | 0 | 0 | 0 | 41 | 1 | 15 | 1 | 0 | 2 | 2 | 0 | 1.00 | 13.67 | 17.0 | 0.7 |
| | | 935 | 0 | 927.3 | 2.58 | 54 | 40 | 0 | 476 | 610 | 36 | 4 | 88 | 1179 | 32 | 282 | 21 | 10 | 284 | 265 | 0 | 0.98 | 11.56 | 1698.0 | 1.8 |
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| 9/26/2025 | | L3 - 4 | 0 | 1.0 | 0.00 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0.00 | 27.00 | 3.0 |
| 9/24/2025 | | L2 - 3 | 0 | 1.0 | 0.00 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0.00 | 18.00 | 3.0 |
| 9/18/2025 | | L2 - 5 | 0 | 1.0 | 0.00 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0.00 | 0.0 |
| 9/11/2025 | | L6 - 7 | 0 | 1.0 | 0.00 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 1.00 | 0.00 | 0.0 |
| 9/10/2025 | | L3 - 4 | 0 | 1.0 | 0.00 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0.00 | 18.00 | 3.0 |
| 9/7/2025 | | L3 - 4 | 0 | 1.0 | 0.00 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0.00 | 3.0 |
| 9/2/2025 | | W5 - 1 | 0 | 1.0 | 0.00 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 1.00 | 18.00 | 0.0 |
| 8/31/2025 | | W3 - 0 | 0 | 1.0 | 0.00 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0.00 | 3.0 |
| 8/30/2025 | | W4 - 1 | 0 | 1.0 | 0.00 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 1.00 | 0.00 | 3.0 |
| 8/25/2025 | | W4 - 0 | 0 | 1.0 | 0.00 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0.00 | 0.0 |
| | | | 0 | 10.0 | 0.00 | 0 | 0 | 0 | 6 | 0 | 0 | 0 | 0 | 9 | 0 | 3 | 0 | 0 | 0 | 0 | 0 | 0.30 | 8.10 | 18.0 |
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| K. Jansen | RP | DET | 12/13/2025 | Joins Tigers on one-year deal. |
| K. Jansen | RP | DET | 2/11/2025 | Receives one-year deal. |
| K. Jansen | RP | DET | 9/23/2024 | IL move made official. |
| K. Jansen | RP | DET | 9/23/2023 | Returns from COVID IL. |
| K. Jansen | RP | DET | 12/13/2022 | Contract with Boston official. |
| K. Jansen | RP | DET | 12/7/2022 | Catches on with Boston. |
| K. Jansen | RP | DET | 7/13/2022 | Makes return from IL. |
| K. Jansen | RP | DET | 6/28/2022 | Sidelined with cardiac issue. |
| K. Jansen | RP | DET | 3/18/2022 | Signs with Atlanta. |
| K. Jansen | RP | DET | 9/14/2021 | Reinstated. |
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| K. Jansen | RP | DET | 6/29/2025 | 7/2/2025 | -1 | Hits allowed |
| K. Jansen | RP | DET | 6/29/2025 | 7/2/2025 | -1 | Earned runs allowed |
| K. Jansen | RP | DET | 6/29/2025 | 7/2/2025 | -1 | Doubles allowed |
| K. Jansen | RP | DET | 9/20/2022 | 10/3/2022 | +1 | Hits allowed |
| K. Jansen | RP | DET | 9/20/2022 | 10/3/2022 | +1 | Earned runs allowed |
| K. Jansen | RP | DET | 4/16/2021 | 4/17/2021 | +6 | Batters Faced |
| K. Jansen | RP | DET | 4/16/2021 | 4/17/2021 | +1 | Hits allowed |
| K. Jansen | RP | DET | 4/16/2021 | 4/17/2021 | +1 | Wild pitches |
| K. Jansen | RP | DET | 4/16/2021 | 4/17/2021 | +1 | Games played |
| K. Jansen | RP | DET | 4/16/2021 | 4/17/2021 | +1 | Walks allowed |
Stars of the month
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| March 29, 2025 | K. Jansen | DET | RP | NA |
| March 30, 2025 | K. Jansen | DET | RP | NA |
| April 01, 2025 | K. Jansen | DET | RP | NA |
| April 06, 2025 | K. Jansen | DET | RP | NA |
| April 08, 2025 | K. Jansen | DET | RP | NA |
| April 12, 2025 | K. Jansen | DET | RP | NA |
| April 18, 2025 | K. Jansen | DET | RP | NA |
| April 24, 2025 | K. Jansen | DET | RP | NA |
| May 02, 2025 | K. Jansen | DET | RP | NA |
| May 03, 2025 | K. Jansen | DET | RP | Rookie star |
| May 09, 2025 | K. Jansen | DET | RP | NA |
| May 12, 2025 | K. Jansen | DET | RP | NA |
| May 13, 2025 | K. Jansen | DET | RP | Rookie star |
| May 16, 2025 | K. Jansen | DET | RP | NA |
| May 17, 2025 | K. Jansen | DET | RP | NA |
| May 19, 2025 | K. Jansen | DET | RP | NA |
| May 20, 2025 | K. Jansen | DET | RP | NA |
| May 23, 2025 | K. Jansen | DET | RP | NA |
| May 30, 2025 | K. Jansen | DET | RP | NA |
| June 02, 2025 | K. Jansen | DET | RP | NA |
| June 03, 2025 | K. Jansen | DET | RP | NA |
| June 06, 2025 | K. Jansen | DET | RP | NA |
| June 07, 2025 | K. Jansen | DET | RP | NA |
| June 09, 2025 | K. Jansen | DET | RP | 2nd star |
| June 10, 2025 | K. Jansen | DET | RP | NA |
| June 15, 2025 | K. Jansen | DET | RP | NA |
| June 16, 2025 | K. Jansen | DET | RP | NA |
| June 18, 2025 | K. Jansen | DET | RP | NA |
| June 20, 2025 | K. Jansen | DET | RP | NA |
| June 24, 2025 | K. Jansen | DET | RP | NA |
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Stars of the week
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| May 02, 2025 | K. Jansen | DET | RP | NA |
| May 13, 2025 | K. Jansen | DET | RP | 2nd star |
| May 20, 2025 | K. Jansen | DET | RP | 1st star |
| May 30, 2025 | K. Jansen | DET | RP | 1st star |
| June 07, 2025 | K. Jansen | DET | RP | 1st star |
| June 15, 2025 | K. Jansen | DET | RP | 2nd star |
| August 12, 2025 | K. Jansen | DET | RP | 1st star |
| August 19, 2025 | K. Jansen | DET | RP | 2nd star |
| August 22, 2025 | K. Jansen | DET | RP | 1st star |
| September 18, 2025 | K. Jansen | DET | RP | 3rd star |
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