Eye
Eye — projected strike-zone judgment and pitch recognition.
What Eye means
Drives walk rate and how much of the hit and power tools survive against advanced pitching. Often the tool that separates prospects who stall at Double-A from those who do not.
What counts as a good Eye
Higher is better — roughly 40 is poor, 50 average, 60 good, and 70 or better elite.
Also written
eye_tool · plate_discipline_grade
Source
FanGraphs