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Matt Lindstrom did a nice job for us. He contributed to the bullpen,” Duquette said. “I just think the left-handed addition to our starting rotation and the capability to get more innings at a high level was better for the team at this stage of the season. And who knows? Joe Saunders is a local kid. Maybe he’s with us beyond this year. That’s something we can take a look at. It certainly strengthens us now.”

To fill Lindstrom’s place on the 25-man roster, the Orioles recalled right-hander Jake Arrieta from Triple-A Norfolk. Arrieta, Baltimore’s opening day starter, went 3-9 with a 6.13 ERA in 18 starts with the Orioles before being optioned to Norfolk on July 5.

The Diamondbacks had talked about going to a six-man rotation so they could keep rookie Tyler Skaggs in the big leagues, but went in a different direction. With Saunders gone, Skaggs has his spot.

Arizona general manager Kevin Towers said the trade had a lot to do with the team’s young pitching. Skaggs, Patrick Corbin and Wade Miley are all rookies, while Trevor Cahill and Ian Kennedy are the only ones left from the opening day rotation.

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AP Sports Writer John Marshall contributed to this report.