Prospect Baseline Prospect Baseline
Model Last Run Sep 24, 2026 · 8:41 AM ET

Included in the latest imported public model. All figures reflect the saved assessment dates.

Player profile

Sean Gamble

KC · Single-A · OF

Kansas City Royals · Age at assessment: 20.2 · Bats: L · Throws: R

Tools Ahead of Results
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Assessment saved: · Stats updated:

Power not yet translating

The verified power grade is running ahead of current game power. ISO and slugging are the clearest checkpoints

High Confidence · 99%
PB Rank#727
Prospect Score60
Median59
Performance39
Trend0.0%

Why the player is here

  • Power 50; game-power evidence sits near the 25th percentile for comparable players
  • ISO is 0.107

Context for this assessment, not a verified explanation for movement between model runs.

Tool vs observed results

Percentile scale
Contact-23.4 percentile gap
Expected 50 Observed 27
Game Power-24.6 percentile gap
Expected 50 Observed 25

Verified tool expectations alongside results for comparable players. Percentiles are not scouting grades.

Model history

Median movement
First recorded 64 Latest recorded 59
68 61 54 2026-06-04 · Median 64 2026-06-05 · Median 64 2026-06-06 · Median 64 2026-06-07 · Median 64 2026-06-08 · Median 64 2026-06-09 · Median 64 2026-06-10 · Median 64 2026-06-11 · Median 64 2026-06-12 · Median 64 2026-06-13 · Median 64 2026-06-14 · Median 64 2026-06-15 · Median 64 2026-06-16 · Median 64 2026-06-17 · Median 64 2026-06-18 · Median 64 2026-06-19 · Median 64 2026-06-20 · Median 64 2026-06-21 · Median 64 2026-06-22 · Median 64 2026-06-23 · Median 64 2026-06-24 · Median 64 2026-06-25 · Median 64 2026-06-26 · Median 64 2026-06-28 · Median 64 2026-06-29 · Median 64 2026-06-30 · Median 64 2026-07-01 · Median 64 2026-07-03 · Median 62 2026-07-05 · Median 62 2026-07-07 · Median 62 2026-07-09 · Median 62 2026-07-11 · Median 62 2026-07-12 · Median 62 2026-07-14 · Median 62 2026-07-16 · Median 62 2026-07-21 · Median 62 2026-07-22 · Median 62 2026-07-23 · Median 62 2026-07-24 · Median 62 2026-07-25 · Median 62 2026-07-26 · Median 62 2026-07-27 · Median 62 2026-07-28 · Median 62 2026-07-29 · Median 62 2026-07-30 · Median 62 2026-07-31 · Median 62 2026-08-01 · Median 62 2026-08-03 · Median 62 2026-08-05 · Median 62 2026-08-07 · Median 62 2026-08-08 · Median 62 2026-08-09 · Median 62 2026-08-10 · Median 62 2026-08-11 · Median 62 2026-08-13 · Median 62 2026-08-14 · Median 62 2026-08-16 · Median 62 2026-08-17 · Median 62 2026-08-18 · Median 62 2026-08-19 · Median 62 2026-08-20 · Median 62 2026-08-22 · Median 62 2026-08-23 · Median 62 2026-08-25 · Median 62 2026-08-27 · Median 59 2026-08-28 · Median 59 2026-09-01 · Median 59 2026-09-02 · Median 59 2026-09-03 · Median 59 2026-09-05 · Median 59 2026-09-06 · Median 59 2026-09-09 · Median 59 2026-09-14 · Median 58.9 2026-09-15 · Median 59 2026-09-16 · Median 59 2026-09-17 · Median 59 2026-09-18 · Median 59 2026-09-19 · Median 59 2026-09-21 · Median 59 2026-09-22 · Median 59 2026-09-24 · Median 59 2026-06-04 2026-09-24

2026-09-24 · Median 59

Saved median assessments. Gaps indicate unavailable or non-comparable observations.
View recorded values
DateMedian
2026-09-2459
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Metrics to follow

ISO 0.107

Separates extra-base impact from batting average

Definition

Isolated power, calculated as slugging percentage minus batting average

SLG 0.310

Tracks total bases per at-bat

Definition

Slugging percentage, weighting extra-base hits more heavily

K% 25.9%

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

2026 season

Current season · regular season
G112
PA487
AVG.203
OBP.315
SLG.310
OPS.625
HR7
SB38
BB%11.7%
K%25.9%

Columbia Fireflies · Single-A · Updated

Scouting Scenario Range

Model Range0.0%
535964
LowMedianHigh
206099
Performance 39

Profile Context

RiskLow Risk · 0
MLB / Model Watch
Confidence90
TypePosition Player

Backtested Forecasts

Separate from scouting grades
2027 MiLB production34.5
Historical 80% error band19–50
MLB arrival in 3 years13%
Productive MLB role in 3 years1%

The next-season score assumes at least 100 PA. A productive MLB role means a regular playing-time season with above-average measured hitting or pitching production. This is not a WAR forecast.

Scouting Tools

Source: Verified public scouting report
Hit icon
Hit50Avg
Power icon
Power50Avg
Speed icon
Speed60Above Avg
Defense icon
Defense50Avg
Arm icon
Arm55Avg
Overall icon
Overall45Fringe

Tool Profile

Tool ProfileHitPowerSpeedDefenseArm20-80 grade scaleArchetype: Balanced Position Player

Player Stats

Recent regular season
PeriodTeamLevelGPAABRH2B3BHRRBIBBSOSBAVGOBPSLGOPS
Last 7 daysNo recent game logs available
Last 30 daysAll teamsAll levels62622130012372.136.269.273.542
Year-by-year regular season
YearTeamLevelGPAABRH2B3BHRRBIBBSOSBAVGOBPSLGOPS
2026Columbia FirefliesSingle-A11248741362841737465712638.203.315.310.625

Regular season only. Totals combine team and level stints. Recent windows overlap and use cached game logs. Stats refreshed: 2026-09-24T08:35:32.

Checklist appearances

  • 2025 Bowman Draft · First Bowman · First autograph
Explore the checklist tool

More Kansas City Royals profiles

Organization reflects each player's saved assessment.