Kenley Jansen
- Position
- P
- Jersey Number
- #74
- H/W
- 6' 5" / 265 lbs
- Bats / Throws
- S / R
- Birth Date
- September 30, 1987 (Age: 39)
- Birth City
- Willemstad, Curacao
- MLB Debut
- July 24, 2010
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| Team | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Career | 2.60 | 983 | 58 | 46 | 498 | 1329 | 0.97 | 972.1 | |
| 2026 | | 3.20 | 50 | 4 | 6 | 22 | 51 | 1.04 | 45.0 |
| 2025 | | 2.59 | 62 | 5 | 4 | 29 | 57 | 0.95 | 59.0 |
| 2024 | | 3.29 | 54 | 4 | 2 | 27 | 62 | 1.06 | 54.2 |
| 2023 | | 3.63 | 51 | 3 | 6 | 29 | 52 | 1.28 | 44.2 |
| 2022 | | 3.38 | 65 | 5 | 2 | 41 | 85 | 1.05 | 64.0 |
| 2021 | | 2.22 | 69 | 4 | 4 | 38 | 86 | 1.04 | 69.0 |
| 2020 | | 3.33 | 27 | 3 | 1 | 11 | 33 | 1.15 | 24.1 |
| 2019 | | 3.71 | 62 | 5 | 3 | 33 | 80 | 1.06 | 63.0 |
| 2018 | | 3.01 | 69 | 1 | 5 | 38 | 82 | 0.99 | 71.2 |
| 2017 | | 1.32 | 65 | 5 | 0 | 41 | 109 | 0.75 | 68.1 |
| 2016 | | 1.83 | 71 | 3 | 2 | 47 | 104 | 0.67 | 68.2 |
| 2015 | | 2.41 | 54 | 2 | 1 | 36 | 80 | 0.78 | 52.1 |
| 2014 | | 2.76 | 68 | 2 | 3 | 44 | 101 | 1.13 | 65.1 |
| 2013 | | 1.88 | 75 | 4 | 3 | 28 | 111 | 0.86 | 76.2 |
| 2012 | | 2.35 | 65 | 5 | 3 | 25 | 99 | 0.85 | 65.0 |
| 2011 | | 2.85 | 51 | 2 | 1 | 5 | 96 | 1.04 | 53.2 |
| 2010 | | 0.67 | 25 | 1 | 0 | 4 | 41 | 1.00 | 27.0 |
Year-by-year
Awards
| Season | Team | Count | Award |
|---|---|---|---|
| 2025 | | #3 | AL Reliever of the Month |
| 2023 | | Red Sox Good Guy Award | |
| 2023 | | #4 | AL All-Star |
| 2021 | | All-MLB Second Team | |
| 2020 | | World Series Championship | |
| 2020 | | #2 | NL Reliever of the Month |
| 2018 | | #3 | NL All-Star |
| 2017 | | #2 | Trevor Hoffman NL Reliever of the Year |
| 2017 | | #2 | NL All-Star |
| 2017 | | #1 | NL Reliever of the Month |
| 2016 | | #1 | Trevor Hoffman NL Reliever of the Year |
| 2016 | | #1 | NL All-Star |
| 2010 | | MiLB.com Organization All-Star | |
| 2010 |  | SOU Mid-Season All-Star | |
| 2008 |  | MID Mid-Season All-Star |