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6/26/2013 7:50 P.M. ET

O's Chen throws bullpen, all clear for rehab assignment

BALTIMORE -- Lefty Wei-Yin Chen (right oblique) threw a bullpen session at Camden Yards on Wednesday, and manager Buck Showalter said everything went well.

That's the final hurdle Chen had to clear before going out on a rehab assignment. He's scheduled to pitch Saturday for Double-A Bowie vs. Harrisburg at 6:35 p.m. ET.

Showalter said he hopes Chen will throw five or six innings Saturday and would then be in line to be recalled to the Major Leagues, stretched out enough to pitch six or seven innings for the Orioles.

Theoretically, he could make three starts before the All-Star break, but Showalter said that's unlikely because he'd like to give Chen an extra of day rest at least once in between starts when he returns.

Roberts, Reimold recovering, nearing return to Majors

BALTIMORE -- Brian Roberts and Nolan Reimold could be close to finishing their Minor League rehab stints and returning to the Orioles. Both are recovering from right hamstring injuries -- Roberts hasn't played since April 4, and Reimold has been out since May 11.

Roberts went 2-for-4 with a strikeout Tuesday in his rehab game for Triple-A Norfolk. Orioles manager Buck Showalter said Roberts also went first to third on a play and made several nice defensive plays. He walked in both plate appearances in a suspended game Wednesday.

It's possible Roberts could be back in the Orioles lineup by the end of this homestand, but Showalter said that isn't guaranteed.

Reimold is 5-for-33 with three RBIs since joining Double-A Bowie. He also could return by the end of the week, but also isn't a sure thing.

"Anything is possible. I don't want to handicap one as being ahead of the other," Showalter said. "Robbie just ended his first day, and you couldn't ask for a better day."

Worth noting

• Steve Johnson (left oblique) is still throwing from flat ground, but he moved back to 90 feet on Wednesday. He threw from 75 feet on Tuesday.

No. 3 prospect Jonathan Schoop (strained lower back) began hitting on Wednesday.

• Infielder Yamaico Navarro has cleared waivers and has been outrighted to Triple-A Norfolk.

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