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08/16/11 11:04 PM ET

D-backs call up Miley to replace Marquis

Left-hander will make Major League debut Saturday in Atlanta

PHILADELPHIA -- The D-backs called up lefty Wade Miley from Triple-A Reno on Tuesday to fill Jason Marquis' spot in the starting rotation. Miley will start Saturday at Atlanta.

He received news of the callup Sunday and was in Philadelphia for the D-backs' 3-2 come-from-behind victory Tuesday.

"It's awesome," Miley said. "Tonight's game was unreal with all the fans cheering and to be able to come back and win it late in the game. It's a great experience, coming into first place in the division."

That also means no grace period for Miley, who will be thrust right into the thick of a pennant race.

Added pressure to perform, right?

"Try to keep it away as much as possible, but I'm sure there will be some," he said.

MLB.com ranks Miley the D-backs' No. 6 prospect. He was named the organization's Minor League Pitcher of the Year in 2010 and was 4-1 with a 3.64 ERA in eight starts for the Aces this season. In his last outing on Saturday, he pitched his first career complete game, allowing one run on three hits with nine strikeouts and one walk.

"He had a good game last game," D-backs manager Kirk Gibson said. "Hopefully he'll have a better game his next start."

Gibson could have opted to pluck Zach Duke or Micah Owings from the bullpen to replace Marquis for the four to six weeks he's expected to miss. But both have an ERA above 7.00 in games in which they have started, and Gibson didn't want to tinker with a bullpen that's "in great shape" and been productive.

"We know he's got good stuff," Gibson said. "He threw a lot in Spring Training. He was kind of pitching for a spot, and we threw a lot at him with his moves and all the fundamental stuff. I think it was a good experience for him."

Marquis was placed on the 15-day disabled list with a fractured right fibula. He was hit by a liner off the bat of Angel Pagan in the third inning of Sunday's 5-3 victory against the Mets. Marquis pitched into the fourth before falling to the ground after hitting Josh Thole with an inside sinker.

Additionally, the D-backs designated right-handed pitcher Kevin Mulvey for assignment. Mulvey, 26, was 3-7 with a 6.98 ERA for the Aces.

Overbay gets first start since joining D-backs

PHILADELPHIA -- Lyle Overbay made his first start for the D-backs on Tuesday since signing with the team on Saturday. He played first base and batted sixth against Roy Halladay and the Phillies.

"He's on a new team, he's had some history with Doc," manager Kirk Gibson said. "[I want to] get him in there, want to get him involved. He's a veteran guy, so he'll be good for us."

Overbay entered Tuesday 3-for-10 with two RBIs and two strikeouts lifetime against Halladay.

Gibson shuffled his lineup for Tuesday's series opener against the National League East leaders, also penciling Sean Burroughs into the lineup in place of Kelly Johnson. Burroughs played third base, with Ryan Roberts moving from third over to Johnson's spot at second.

"He's just struggled lately," Gibson said of Johnson, who's hitting 4-for-37 this month. "He really presses. We talked the other day a little bit. He's not that far off. He's got a lot of pride and he hasn't hit the ball the way he knows he can."

Worth noting

D-backs manager Kirk Gibson said he would like to see rookie starter Josh Collmenter use his curveball more but still be selective, because he can get hit hard if he overexposes it. Gibson was looking for it on the first pitch, behind in the count and also to induce more ground balls.

Nate Mink is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.