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8/30/2013 9:34 P.M. ET

Hammel to make next rehab start Tuesday in Aberdeen

NEW YORK -- Orioles right-hander Jason Hammel will make his second rehab start for short-season Aberdeen on Tuesday and the team could activate him from the disabled list late next week.

Hammel tossed 3 2/3 scoreless innings Thursday night for Double-A Bowie.

"He felt good physically," manager Buck Showalter said of the report on Hammel's outing.

Showalter said Hammel, who has been sidelined with right forearm tightness, could be activated Sept. 7 or 8 and the organization is still undecided on his exact role. Hammel, who will be part of an expanded roster, could be in the bullpen or rotation depending on the team's need. The plan for Tuesday's outing is to get him to 60-65 pitches and somewhere in the five-inning range.

Hammel was 7-8 with a 5.20 ERA in 21 starts before being placed on the disabled list when the Orioles acquired starter Bud Norris in late July.

Worth noting

• Dan Johnson was signed to a Minor League contract by the Orioles' Triple-A affiliate on Friday. The infielder hit .253 with 21 home runs and 69 RBIs in 133 games with the Scranton/Wilkes-Barre RailRiders (Yankees) this year.

• Ryan Flaherty, who was optioned on Tuesday to clear a roster spot for Wilson Betemit, has been transferred to Frederick from Class A Delmarva. Flaherty is expected back with the team when Frederick's season ends this Tuesday.

Wei-Yin Chen, who was optioned to the Gulf Coast League for Kevin Gausman on Wednesday, will rejoin the team Saturday and will be added to the roster with Sunday's callups and start the series finale in New York.

• The Orioles are the first Major League team to post 100 errorless games by the end of August, according to STATS.

Brittany Ghiroli is a reporter for MLB.com. Read her blog, Britt's Bird Watch, and follow her on Twitter @britt_ghiroli. This story was not subject to the approval of Major League Baseball or its clubs.