Reds manager Terry Francona said that McLain is not in Thursday's lineup against the Phillies due to a calf issue, Charlie Goldsmith of Fox 19 Now Cincinnati reports.
It seems at this juncture to be a day-to-day injury, but with the All-Star break looming, the Reds could choose to put McLain on the injured list if he doesn't improve in a hurry. He's been playing center field lately versus lefties, but because McLain is banged up it will be TJ Friedl in center against southpaw Jesus Luzardo.