The Cardinals are cautiously optimistic that Shelby Miller will be able to return to the mound Sunday against the Dodgers, but a final decision will likely wait until Saturday.

Miller tossed a bullpen session Friday in Los Angeles, and did not report any issues with the back injury that forced him out of his last outing. Still, the injury is not completely gone, which is why manager Mike Matheny told MLB.com he will wait to see how Miller responds Saturday before confirming him for the start Sunday.

"We've been very optimistic as to how he's progressing, but we'll continue to watch," Matheny said. "We're going to need him to feel pretty good in order to move in the direction that we're going to be able to have him start. We'll just see what he says, see how that's interpreted by the medical team, and then make a decision."