Player profile
Alejandro Rosario
Washington Nationals · Age at assessment: 24.7 · Bats: R · Throws: R
Results Ahead of Tools
Assessment saved:
Command results ahead of the tool grade
Current strike throwing is outperforming the verified command expectation
High Confidence · 90%PB Rank#1,889
Prospect Score49
Median48
Performance50
Trend0.0%
Why the player is here
- Command 60; command evidence sits near the 99th percentile for comparable pitchers
- BB/9 is 1.3
What could change the read
- A 13.1 K/9 shows the stuff is still missing bats
Context for this assessment, not a verified explanation for movement between model runs.
Tool vs observed results
Percentile scaleStuff+29.6 percentile gap
Command+32.6 percentile gap
Verified tool expectations alongside results for comparable players. Percentiles are not scouting grades.
Model history
Median movement
First recorded 41
Latest recorded 48
2026-09-24 · Median 48
View recorded values
| Date | Median |
|---|---|
| 2026-09-24 | 48 |
| 2026-09-22 | 48 |
| 2026-09-21 | 48 |
| 2026-09-19 | 48 |
| 2026-09-18 | 48 |
| 2026-09-17 | 48 |
| 2026-09-16 | 48 |
| 2026-09-15 | 48 |
| 2026-09-14 | 48.1 |
| 2026-09-09 | 48 |
| 2026-09-06 | 40 |
| 2026-09-05 | 40 |
| 2026-09-03 | 40 |
| 2026-09-02 | 40 |
| 2026-09-01 | 40 |
| 2026-08-28 | 41 |
| 2026-08-27 | 41 |
Metrics to follow
BB/9
1.3
Primary strike-throwing checkpoint
Definition
Walks allowed per nine innings pitched. Lower is generally better
WHIP
0.90
Tracks total traffic allowed
Definition
Walks and hits allowed per inning pitched. Lower is generally better
K-BB%
33.1%
Balances dominance against walks
Definition
Strikeout percentage minus walk percentage, a compact measure of pitcher dominance and control
Next checkpointRecheck BB/9, WHIP, and K-BB% after the next 20 innings
