Jackson Steensma
Seattle Mariners · Age at assessment: 22.5 · Bats: S · Throws: R
Dominance ahead of the tool grades
Current strikeout and K-BB results are outperforming the verified pitch-quality expectation
High Confidence · 97%Why the player is here
- Best pitch grade 50; dominance evidence sits near the 92th percentile for comparable pitchers
- K/9 is 12.7
What could change the read
- A 2.1 BB/9 gives the profile useful command support
Context for this assessment, not a verified explanation for movement between model runs.
Tool vs observed results
Percentile scaleVerified tool expectations alongside results for comparable players. Percentiles are not scouting grades.
Model history
Median movement2026-09-24 · Median 60
View recorded values
| Date | Median |
|---|---|
| 2026-09-24 | 60 |
| 2026-09-22 | 60 |
| 2026-09-21 | 60 |
| 2026-09-19 | 60 |
| 2026-09-18 | 60 |
| 2026-09-17 | 60 |
| 2026-09-16 | 60 |
| 2026-09-15 | 60 |
| 2026-09-14 | 60.3 |
| 2026-09-09 | 60 |
| 2026-09-06 | 60 |
| 2026-09-05 | 60 |
| 2026-09-03 | 60 |
| 2026-09-02 | 60 |
| 2026-09-01 | 60 |
| 2026-08-28 | 59 |
| 2026-08-27 | 59 |
| 2026-08-25 | 59 |
| 2026-08-23 | 59.4 |
| 2026-08-22 | 59 |
| 2026-08-20 | 59 |
| 2026-08-19 | 59 |
| 2026-08-18 | 59 |
| 2026-08-17 | 59 |
| 2026-08-16 | 59 |
| 2026-08-14 | 61 |
| 2026-08-13 | 61 |
| 2026-08-11 | 61 |
| 2026-08-10 | 61 |
| 2026-08-09 | 61 |
| 2026-08-08 | 61 |
| 2026-08-07 | 57 |
| 2026-08-05 | 57 |
| 2026-08-03 | 57 |
| 2026-08-01 | 57 |
| 2026-07-31 | 56 |
| 2026-07-30 | 56 |
| 2026-07-29 | 56 |
| 2026-07-28 | 56 |
| 2026-07-27 | 56 |
| 2026-07-26 | 56 |
| 2026-07-25 | 56 |
| 2026-07-24 | 56 |
| 2026-07-23 | 56 |
Metrics to follow
Primary bat-missing indicator
Definition
Strikeouts recorded per nine innings pitched
Separates dominance from walk cost
Definition
Strikeout percentage minus walk percentage, a compact measure of pitcher dominance and control
Shows whether control is limiting the arsenal
Definition
Walks allowed per nine innings pitched. Lower is generally better
Next checkpointRecheck K/9, K-BB%, and BB/9 after the next 20 innings
