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NEW YORK -- The Yankees bullpen could get David Robertson back late next week -- and perhaps be a major strength of the team during the stretch run.

Robertson will pitch for Triple-A Scranton/Wilkes Barre in Rochester on Sunday and Tuesday. From there, the team's medical staff will evaluate the right-hander and determine if he's fit to meet the team in Washington, D.C. for next weekend's series against the Nationals. If Thursday's pain-free bullpen session at Yankee Stadium was any indication, Robertson may be on the fast track.

"I felt like I tested it yesterday,” Robertson said. “I threw the ball hard but the last thing I want to do is come back and say I’m fine (and get hurt).”

In Tampa, Fla., via the AP, Joba Chamberlain threw off a mound for the first time since suffering an ankle injury in March, making 25 throws in a batting cage at the Yankees' Minor League complex. 

”It felt good,” Chamberlain said. ”Another step forward. That’s all you can do.”

Chamberlain, who was working his way back from Tommy John surgery when he dislocated his right ankle bouncing on a trampoline on March 22, resumed running sprints. The right-hander is determined to beat the odds and pitch for the Yankees this season.  

”Is that even a question?” he said.

David Aardsma, also recuperating from T.J. surgery, may not be far behind. Aardsma worked his third batting practice session on Friday, throwing 40 pitches, and may pitch in a simulated game next week.

Follow Jon Lane on Twitter: @JonLaneNYC