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7/13/2014 4:21 P.M. ET

Pomeranz activated off DL, staying in Triple-A

Samardzija, Hammel, Gray, Kazmir, Chavez slated for rotation after break

SEATTLE -- The Athletics have reinstated left-hander Drew Pomeranz from the 15-day disabled list and optioned him to Triple-A Sacramento, the club announced Sunday.

Pomeranz, who fractured his right, non-throwing hand in mid-June when he slammed it on a chair, was stellar Saturday night with Sacramento in his first rehab start, allowing just one hit on a solo home run over four innings while striking out seven and not issuing a walk.

He'll make his next start for the River Cats on Thursday.

After that?

"We'll just see how it all plays out," A's manager Bob Melvin said. "As it is right now, this is the current construction."

Before the injury, Pomeranz went 5-4 with a 2.91 ERA in 17 games (eight starts) with Oakland. The recent addition of starters Jeff Samardzija and Jason Hammel make his return to the big leagues less certain.

"It's terrific depth," Melvin said.

On Sunday, Melvin announced Oakland's post-All-Star break rotation. After four days off, the A's begin a three-game set with the Orioles on Friday. Samardzija will start, then Hammel on Saturday, before Sonny Gray, Scott Kazmir and Jesse Chavez round out the five.

Melvin didn't discount the possibility of Pomeranz rejoining the team as a reliever.

"Drew has shown that he can do it in the rotation and the bullpen, so he opens up some options for himself," Melvin said. "Obviously, he opens up some options for us in both roles."

Worth noting

• Center fielder Coco Crisp (sore neck) was out of the lineup for the fourth day in a row Sunday. Bob Melvin said Crisp is improving every day but didn't offer a timetable for his return, though the manager did acknowledge the four days off for the All-Star break should help.

"I've said before, once he turns a corner, sometimes it happens pretty quickly. I know he feels better," Melvin said. "He was out on the field yesterday. He didn't hit, but good to get him back out on the field running around."

• Right fielder Josh Reddick, who's been on the disabled list since June 29 with a strained right knee, will begin his rehab assignment with Class A Stockton on Monday but doesn't have a timetable for a return.

"I don't know yet, it depends on how everything goes, how he feels, how he's swinging the bat, all of the above," Melvin said. "Granted it would be nice to have him back. We're a little banged up right now. You look today, we have none of our starting outfielders out there."

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