Performance shows up in the swing before it shows up in the stats — and Ha-Seong Kim’s signals are talking.

Trailing expected wOBA .237 against a .125 surface line (n=36). Inside today’s flagged cohort his underlying reading sits at the 3th percentile while his surface line sits at the 1th — the shaded gap below is the signal, and it’s the pattern that preceded measurable improvement across four held-out seasons.