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Breaking ball

Niche

Slow Curve

aka slow hook · ephus curve (at the slow extreme)

A curveball thrown way down in speed, a big slow looping change of pace meant to wreck a hitter's timing. Dialed down far enough, it starts to blur into the lobbing eephus.

Schematic baseball cover. This pitch has no filed seam geometry yet — the grip and shape below are sourced in words, not measured here.

The grip

Essentially the same curveball shape, just dialed way down in effort and speed to function as a big looping change-of-pace.

What it does

A high, slow, looping arc meant to disrupt timing; at the extreme slow end it blurs into the eephus — Zack Greinke has floated curves slow enough to brush that line, the modern descendant of the classic lob pitch.

Who throws itZack Greinke

Basic file

This pitch has a sourced one-line grip and movement and an honest explanation — not yet a filed specimen with authored grip geometry and a full craft chapter. A fuller breakdown is coming. Sourced, not corrected.