DENVER -- Even though his starting pitcher only lasted four innings in Friday's series opener in Colorado, Marlins manager Don Mattingly was able to avoid taxing his bullpen in the 11-3 defeat -- a good first hurdle to clear in setting up a pitcher to fill the injured Jose Urena 's spot in the rotation when it comes up Tuesday in Miami. Urena went on the disabled list Friday (retroactive to Thursday) with a right shoulder impingement.

"We were able to spread it out and not really get to the guys we use later in the game, so for the most part, we probably came out OK," Mattingly said of Friday's bullpen usage. "Today's game could change it, but for the most part, we were able to spread it out with an inning a piece and didn't really have to burn anybody up a bunch of innings, so it worked out."

Before the series started, Mattingly mentioned Elieser Hernandez and Brett Graves as potential relievers who could make a spot start on Tuesday if the Marlins opted to fill Urena's spot from the Major League staff, rather than call up a starter from Triple-A New Orleans. One day into the series, the picture is looking clearer for Mattingly.

"Hernandez will probably be the guy that gets the start," Mattingly said before Saturday's middle game. "He pitched basically on [Dan] Straily's day [last Tuesday]. Last night, we really weren't going to use him, but he didn't throw his bullpen, so we just used it as his bullpen. He probably won't be available the rest of the series, but everybody else should be available. I think we're OK."

Rojas scratched

Shortstop Miguel Rojas was scratched from Saturday's lineup with a left hand contusion.

The Marlins juggled their existing lineup, shifting Yadiel Rivera from third base to short, moving Brian Anderson from right field to third, swapping Cameron Maybin from left to right and bringing Derek Dietrich off the bench to play left.

Before the lineup changes, Mattingly said he'd been tempted to put Dietrich back in the lineup after he went 3-for-5 Friday and hit his ninth homer of the season. Dietrich is hitting .386 (27-for-70) since May 31 with five doubles and four homers entering Saturday.

"Kind of [tempted], but just with the outfield, we're really going with defense," Mattingly said. "This is a huge field, and you see the trouble he had out there."

The Rockies started left-hander Tyler Anderson on Saturday, and Mattingly has been platooning Dietrich and Maybin in the outfield against righties and lefties, respectively.

"Keeps everybody involved," Mattingly said of the outfield platoon. "[Dietrich] has been successful with what we're doing. We kind of found out if you go every day, every day with him it ends up wearing down. Anderson's a pretty even split, righties and lefties. Not that big of a difference. Could try to take his change away with a lefty a little bit more, but for the most part we just try to stay with our lineup. Just because of Coors, with the altitude, we always try to give guys days [off], but sometimes you can't do it."