A few Orioles tidbits for this evening:
Second baseman Brian Roberts, on the disabled list retroactive to May 17 with a concussion, will fly to Pittsburgh on June 7 to meet with sports-related concussion specialist Dr. Michael Collins. It will be a follow-up from a previous examination by Collins ho prescribed to weeks of non-strenuous activity. There is no specific timetable for his return. Roberts hasn't played in a game since May 16, when he slid headfirst into first base against the Boston Red Sox.
Delmarva SS Manny Machado, who has been on the disabled list since dislocating his kneecap while running the bases May 5, is expected to leave extended spring training Sunday and could play with the Shorebirds on Monday at West Virginia. The 18-year-old Machado, the organization's top prospect, hit .333 with five homers and 21 RBIs in his first 25 games.
Delmarva third baseman Jonathan Schoop is expected to be promoted to High-A Frederick on Sunday. The 19-year-old Schoop, also one of the Orioles' top young prospects, hit .314 with seven homers and 31 RBIs in his first 50 games with Delmarva. Schoop will play a combination of second base, shortstop and third at Frederick.
Frederick outfielder Trent Mummey, who has been on the disabled list with a concussion since running into an outfield wall May 4, was activated Saturday by the Keys. He had been hitting .263 in 10 games with Frederick after a late April call-up.
RHP Justin Duchscherer's five-inning extended rehab outing will be Tuesday in Sarasota. If Duchscherer (left hip) makes it through that without incident the organization will decide whether to send him out on a rehab assignment.