Manager Jim Tracy said he didn't want the 23-year-old, who left Friday night's game after awkwardly twisting his left ankle, to return to game action with newly acquired Jonathan Sanchez pitching.
"I just wanted Ramon Hernandez to catch Jonathan tonight, just because [Rosario] might've had to react to some pitches that are thrown errantly," Tracy said. "And from what I was telling you guys yesterday, he still is having trouble pushing to his right. I don't want to put him in a compromising position."
Despite receiving more rest, Rosario has made enough progress with his ankle that he was available to the Rockies to pinch-hit if needed Monday and could make the start Tuesday.
"I think there's a real good chance we'll have him available to catch tomorrow," Tracy said. "He is available to us. I just didn't want to push him into a bad spot."