Two guys on a path with binocs called this one out. I photographed it and later tonight it does appear to line up with all the marking on Glassberg's Swift Guide for this species...away from Tropical or Common/White's.
This is the male.
This was identified by Jim Brock today who was with the group and said P. communis not in area.
Pyrgus is a genus in the skippers butterfly family, Hesperiidae, known as the grizzled skippers. The name 'Grizzled Skipper' best describes this genus, but in some countries the name 'Checkered Skipper' or 'Chequered Skipper' is applied to some species. Strictly speaking, 'chequered skippers' applies to butterflies of the genus Carterocephalus.