The Odyssey Stroke Lab Black generation doesn't include the R-Ball variant.

Odyssey logo

Variant

Used Odyssey Stroke Lab Black R-Ball

2020

Where the 2-Ball uses two discs, the R-Ball uses one, set into a rounded crown just behind the face — the same ball-sized reference in a far smaller head. A 2019 shape, plain or slant, and one of the rarer Stroke Lab heads to find used.