Gray will start Sunday against the Nationals, Nick Groke of The Athletic reports.
Gray was originally set to start Tuesday at Coors Field against the Dodgers. He'll get a better draw now, as he'll fill the rotation slot of Ryan Feltner, who was optioned Saturday. In two starts since returning from the injured list, Gray has allowed five earned runs across 10 innings -- good for a 4.50 ERA -- while racking up 15 strikeouts as opposed to just three walks.