Jonathon Long
Miami Marlins · Age at assessment: 24.7 · Bats: R · Throws: R
Power tool translating
Current game power is broadly aligned with the verified power grade
High Confidence · 99%Why the player is here
- Power 50; game-power evidence sits near the 63th percentile for comparable players
- ISO is 0.172
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 59
View recorded values
| Date | Median |
|---|---|
| 2026-09-24 | 59 |
| 2026-09-22 | 59 |
| 2026-09-21 | 59 |
| 2026-09-19 | 59 |
| 2026-09-18 | 59 |
| 2026-09-17 | 59 |
| 2026-09-16 | 59 |
| 2026-09-15 | 59 |
| 2026-09-14 | 59.7 |
| 2026-09-09 | 60 |
| 2026-09-06 | 58 |
| 2026-09-05 | 58 |
| 2026-09-03 | 58 |
| 2026-09-02 | 58 |
| 2026-09-01 | 58 |
| 2026-08-28 | 58 |
| 2026-08-27 | 58 |
| 2026-08-25 | 58.7 |
| 2026-08-23 | 58.7 |
| 2026-08-22 | 59 |
| 2026-08-20 | 59 |
| 2026-07-24 | 58 |
| 2026-07-23 | 59 |
| 2026-07-22 | 58 |
| 2026-07-21 | 58 |
| 2026-07-16 | 57 |
| 2026-07-14 | 57 |
| 2026-07-12 | 57 |
| 2026-07-11 | 57 |
| 2026-07-09 | 56 |
| 2026-07-07 | 56 |
| 2026-07-05 | 56 |
| 2026-07-03 | 56 |
| 2026-07-01 | 53 |
| 2026-06-30 | 53 |
| 2026-06-29 | 53 |
| 2026-06-28 | 53 |
| 2026-06-26 | 52 |
| 2026-06-25 | 53 |
| 2026-06-24 | 52 |
| 2026-06-23 | 52 |
| 2026-06-22 | 52 |
| 2026-06-21 | 51 |
| 2026-06-20 | 52 |
| 2026-06-19 | 51 |
| 2026-06-18 | 50 |
| 2026-06-17 | 50 |
| 2026-06-16 | 50 |
| 2026-06-15 | 50 |
| 2026-06-14 | 50 |
| 2026-06-13 | 50 |
| 2026-06-12 | 49 |
| 2026-06-11 | 50 |
| 2026-06-10 | 50 |
| 2026-06-09 | 49 |
| 2026-06-08 | 49 |
| 2026-06-07 | 49 |
| 2026-06-06 | 49 |
| 2026-06-05 | 49 |
| 2026-06-04 | 49 |
Metrics to follow
Separates extra-base impact from batting average
Definition
Isolated power, calculated as slugging percentage minus batting average
Tracks total bases per at-bat
Definition
Slugging percentage, weighting extra-base hits more heavily
Shows the swing-and-miss cost of accessing power
Definition
Percentage of plate appearances ending in a strikeout. Lower is generally better for hitters
Next checkpointRecheck ISO, SLG, and K% after the next 75 plate appearances
