Major League Equivalency (MLE) Methodology

Translating Minor League performance to Major League equivalents relies on empirical league difficulty factors, strikeout-to-walk transition regression, and age-to-league context. Double-A (Texas League) hitters typically face an offensive discount of ~11% to 15% in ISO and a 3-5 percentage point jump in strikeout rate when facing Big League pitching arsenals.

For top teenage prospects like Leo De Vries—acquired by the Athletics in the 2025 Mason Miller deal—performing at a .290/.378/.458 clip with 35 XBH and 34 SBs at an age 3.5 years younger than league average indicates elite bat-to-ball discipline and top-tier table-setting upside.

20-80 Scouting Scale Calibration

• ◆ Hit Tool (55): Projecting .255–.265 MLB batting average with 82%+ zone contact rate.
• ◆ Game Power (50): 15–18 annual MLB home runs backed by 30+ gap doubles.
• ◆ Speed & Baserunning (65): 25–30+ projected MLB stolen bases with >80% conversion efficiency.
• ◆ Discipline / Eye (60): Above-average 10–12% walk rate mitigating transition slumps.