Prospect Baseline Prospect Baseline
Model Last Run Sep 25, 2026 · 2:59 PM ET

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

Player profile

Gregory Pio

SEA · DSL · OF

Seattle Mariners · Age at assessment: 17.7 · Bats: R · Throws: R

Results Ahead of Tools
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Assessment saved: · Stats updated:

Contact results ahead of the tool grade

Current contact and on-base results are outperforming the verified hit-tool expectation

High Confidence · 99%
PB Rank#743
Prospect Score60
Median56
Performance55
Trend0.0%

Why the player is here

  • Hit 40; contact evidence sits near the 62th percentile for comparable players
  • K% is 16.0%

What could change the read

  • A 17.5% walk rate provides meaningful approach support
  • A 0.398 OBP is keeping the offensive foundation intact

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

Tool vs observed results

Percentile scale
Contact+29.2 percentile gap
Expected 33 Observed 63
Game Power+20.1 percentile gap
Expected 50 Observed 70

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

Model history

Median movement
First recorded 33 Latest recorded 56
61 45 29 2026-06-04 · Median 33 2026-06-05 · Median 33 2026-06-06 · Median 33 2026-06-07 · Median 33 2026-06-08 · Median 33 2026-06-09 · Median 33 2026-06-10 · Median 33 2026-06-11 · Median 50 2026-06-12 · Median 50 2026-06-13 · Median 50 2026-06-14 · Median 49 2026-06-15 · Median 49 2026-06-16 · Median 52 2026-06-17 · Median 52 2026-06-18 · Median 52 2026-06-19 · Median 52 2026-06-20 · Median 54 2026-06-21 · Median 54 2026-06-22 · Median 54 2026-06-23 · Median 55 2026-06-24 · Median 54 2026-06-25 · Median 52 2026-06-26 · Median 52 2026-06-28 · Median 54 2026-06-29 · Median 54 2026-06-30 · Median 52 2026-07-01 · Median 53 2026-07-03 · Median 54 2026-07-05 · Median 54 2026-07-07 · Median 54 2026-07-09 · Median 54 2026-07-11 · Median 54 2026-07-12 · Median 54 2026-07-14 · Median 56 2026-07-16 · Median 55 2026-07-21 · Median 55 2026-07-22 · Median 55 2026-07-23 · Median 55 2026-07-24 · Median 54 2026-07-25 · Median 54 2026-07-26 · Median 54 2026-07-27 · Median 52 2026-07-28 · Median 52 2026-07-29 · Median 52 2026-07-30 · Median 52 2026-07-31 · Median 52 2026-08-01 · Median 52 2026-08-03 · Median 52 2026-08-05 · Median 52 2026-08-07 · Median 52 2026-08-08 · Median 51 2026-08-09 · Median 51 2026-08-10 · Median 51 2026-08-11 · Median 52 2026-08-13 · Median 52 2026-08-14 · Median 52 2026-08-16 · Median 52 2026-08-17 · Median 52 2026-08-18 · Median 51 2026-08-19 · Median 51 2026-08-20 · Median 51 2026-08-22 · Median 51 2026-08-23 · Median 51.3 2026-08-25 · Median 51.3 2026-08-27 · Median 55 2026-08-28 · Median 55 2026-09-01 · Median 56 2026-09-02 · Median 56 2026-09-03 · Median 56 2026-09-05 · Median 56 2026-09-06 · Median 56 2026-09-09 · Median 56 2026-09-14 · Median 56.4 2026-09-15 · Median 56 2026-09-16 · Median 56 2026-09-17 · Median 56 2026-09-18 · Median 56 2026-09-19 · Median 56 2026-09-21 · Median 56 2026-09-22 · Median 56 2026-09-24 · Median 56 2026-09-25 · Median 56 2026-06-04 2026-09-25

2026-09-25 · Median 56

Saved median assessments. Gaps indicate unavailable or non-comparable observations.
View recorded values
DateMedian
2026-09-2556
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Metrics to follow

K% 16.0%

Primary contact-pressure indicator

Definition

Percentage of plate appearances ending in a strikeout. Lower is generally better for hitters

BB% 17.5%

Shows whether patience offsets swing-and-miss

Definition

Percentage of plate appearances ending in a walk

OBP 0.398

Tracks the overall on-base foundation

Definition

On-base percentage, measuring how often a hitter reaches base

Next checkpointRecheck K%, BB%, and OBP after the next 75 plate appearances

2026 season

Current season · regular season
G47
PA206
AVG.275
OBP.398
SLG.419
OPS.817
HR3
SB18
BB%17.5%
K%16.0%

DSL Mariners · DSL · Updated

Scouting Scenario Range

Model Range0.0%
515662
LowMedianHigh
206099
Performance 55

Profile Context

RiskLow Risk · 24
MLB / Model Watch
Confidence85
TypePosition Player

Backtested Forecasts

Separate from scouting grades
2027 MiLB production48.1
Historical 80% error band30–66
MLB arrival in 3 years13%
Productive MLB role in 3 years2%

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
Hit40Developmental
Power icon
Power50Avg
Speed icon
Speed55Avg
Defense icon
Defense50Avg
Arm icon
Arm50Avg
Overall icon
Overall40Developmental

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 daysNo recent game logs available
Year-by-year regular season
YearTeamLevelGPAABRH2B3BHRRBIBBSOSBAVGOBPSLGOPS
2026DSL MarinersDSL47206167354693327363318.275.398.419.817

Regular season only. Totals combine team and level stints. Recent windows overlap and use cached game logs. Stats refreshed: 2026-09-25T14:54:05.

Checklist appearances

  • 2026 Bowman Chrome · First Bowman · First autograph
Explore the checklist tool

More Seattle Mariners profiles

Organization reflects each player's saved assessment.