Jackson Steensma
| IP | 19.0 |
|---|---|
| ERA | 1.42 |
| WHIP | 0.470 |
| BB/9 | 1.0 |
| SO/9 | 13.7 |
- Full name Jackson Steensma
- Born 03/12/2004 in Byron Center, MI
- Profile Ht.: 6'4" / Wt.: 250 / Bats: S / Throws: R
- School Appalachian State
-
Drafted in the 9th round (272nd overall) by the Seattle Mariners in 2025 (signed for $201,300).
View Draft Report
Steensma is a 6-foot-4, 245-pound righthander who pitched as a reliever for Appalachian State in 2023, then moved into a starting role in 2024. He was expected to be the team’s Friday night starter this spring, but missed the entire year with an injury. Steensma owns a career 4.10 ERA in 94.1 innings with App State, including a 26.7% strikeout rate and 9.4% walk rate. In 2024 Steensma sat around 93 mph and touched 96 with his fastball. He did an excellent job throwing the pitch for strikes, and also mixed in a mid-80s changeup, a mid-80s slider and a distinct upper-70s curveball.
Career Transactions
-
Inland Empire 66ers placed RHP Jackson Steensma on the 7-day injured list.
-
RHP Jackson Steensma assigned to Inland Empire 66ers from ACL Mariners.
-
RHP Jackson Steensma assigned to ACL Mariners.
-
Seattle Mariners signed RHP Jackson Steensma.
- RHP Jackson Steensma assigned to Johnson City Doughboys.
- RHP Jackson Steensma and assigned to High School Workout.
