Muncy is not in the Athletics' starting lineup against the Marlins on Friday.
The Athletics will give the nod at third base to Joshua Kuroda-Grauer, who will bat fifth against Marlins right-hander Tyler Phillips in Friday's series opener. Muncy has reached base safely in each of his last eight games, going 8-for-28 (.286) with one steal, three walks, one home run and four RBI in that span.