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6/5/2013 9:15 P.M. ET

Skaggs earns spot in D-backs' rotation

ST. LOUIS -- The D-backs have not officially announced that Tyler Skaggs will start Sunday against the Giants at Chase Field, but manager Kirk Gibson said the left-hander is staying in the rotation in place of the injured Brandon McCarthy.

McCarthy, who was placed on the disabled list last Saturday with right shoulder inflammation, had an MRI this week that confirmed the initial diagnosis. It is unknown exactly how long he will have to be out.

"In my mind, he'll be in the rotation," Gibson said of Skaggs. "We really have no other options. We're not going to send him down and go get somebody else. I haven't talked to [general manager Kevin Towers] but in my mind that's kind of where we're at."

Skaggs defeated the Rangers on May 27 when he tossed six scoreless innings, and he pitched Tuesday against a very good offensive team in the Cardinals.

Skaggs allowed five runs over 5 2/3 innings, but he could have gone six innings and gotten out with one less run had umpire Jordan Baker not missed a call at third base.

"I felt good," Skaggs said. "I felt like I threw the ball well. I made a few bad pitches here and there. I felt like I competed and kept the team in the game. The most important thing is that we won. It took us 14 innings, but we got it. It was a good team win."

Skaggs drew praise from 2011 World Series hero David Freese following Tuesday's game.

"Tyler's tough," Freese said. "He's a young guy, but knows exactly what he wants to do out there, especially against a tough lineup."

Hudson to have elbow examined after setback

ST. LOUIS -- D-backs right-hander Daniel Hudson is scheduled to see Dr. Michael Lee on Thursday to have his right elbow examined after feeling stiffness in it during his first rehab start for Double-A Mobile on Tuesday night.

"He was sore," D-backs manager Kirk Gibson said. "I'm taking an optimistic view on that. He hasn't had any setbacks at all since he's been doing his rehab. I'm confident it'll work out fine.

"Does this slow him down a little bit? It probably does, yes."

Initially, Hudson was expected to return from last July's Tommy John surgery around the All-Star Break, but recently it looked like he might be able to return as soon as a few weeks from now.

After throwing in extended spring games, Tuesday was his first start against higher level competition and in front of a crowd.

"You get into a game, you probably have never quite let it go like that so far," Gibson said. "You're stressing your arm in a different fashion than you have so far since your surgery. I'm pretty optimistic about it."

Collmenter relieves bullpen in extra-inning win

ST. LOUIS -- Josh Collmenter got both a win and a save Tuesday night, but only one showed up in the box score next to the D-backs right-hander's name.

Collmenter was credited with the win after tossing four scoreless innings as the D-backs outlasted the Cardinals in 14 innings Tuesday. The fact that he was able to go that long saved the D-backs bullpen from being completely decimated by the game.

It's not the first time Collmenter has accomplished that this year. In the season's third game, he turned in a five-inning relief outing in a 16-inning win over the Cardinals at Chase Field.

Collmenter played catch Wednesday afternoon and said he felt good, but the team is likely to give him a few days off before using him again in a game.

"I was joking with the guys, just got to squirt a little oil in the arm and 'Iron Mike' is good to go," Collmenter said. "If needed, I could throw, but I'm sure they'll give me a day or two and make sure I'm ready to go by then and be 100 percent."

Despite the fact that the game ended in the wee hours of the morning, Collmenter stuck around the clubhouse for a while, going through his normal postgame exercise routine so as to make sure his arm would recover even faster.

"They asked me if I felt good, and I was going to go back out there for another [inning] if we didn't take the lead," Collmenter said. "After that it would have been an inning by inning basis, but up to that point I felt really strong. I didn't really feel any fatigue or anything."

Steve Gilbert is a reporter for MLB.com. Read his blog, Inside the D-backs, and follow him on Twitter @SteveGilbertMLB. This story was not subject to the approval of Major League Baseball or its clubs.