Dylan Bundy (elbow) threw a 40-pitch bullpen session on Wednesday afternoon in Sarasota, Florida.
Bundy tossed eight breaking balls -- the first time he had introduced those pitches since he began his rehab from Tommy John surgery. The prized 21-year-old right-hander could be an option for the O's around late June.
Travis Ishikawa has elected free agency.
The news comes from Zach Links at MLB Trade Rumors. Ishikawa was designated for assignment by the Pirates last week to open a roster spot for new first baseman Ike Davis. Ishikawa, 30, is a .257/.321/.397 career hitter in 897 major league plate appearances.
Josh Johnson is scheduled to undergo Tommy John reconstructive elbow surgery on Thursday.
It's the second Tommy John surgery of Johnson's career, and he can now be ruled out through at least the first month of the 2015 season. He earned National League Cy Young Award votes in 2010 after posting a 2.30 ERA and 186 strikeouts in 183 2/3 innings for the Marlins, but chronic arm injuries have since derailed the talented right-hander. The Padres have a $4 million option on him for next year.
Ryan Zimmerman (thumb) has begun running in a pool.
Zimmerman is staying in shape while his fractured right thumb heals. He is still unable to grip a bat and is not expected to return until mid-to-late May.
Scott Hairston (oblique) was able to take on-field batting practice for the first time Wednesday.
Hairston reported no discomfort during or after the BP session and should soon be cleared for a minor league rehab assignment. The veteran is on track to rejoin the Nationals' bench at some point in early May.
Tim Collins (elbow) has been cleared to begin a minor league rehab assignment with Triple-A Omaha.
Collins is expected to make two appearances there before returning to the Royals' bullpen. The left-hander has been out since April 7 with a mild elbow flexor strain.
Aaron Harang was fantastic again Wednesday, striking out 11 over six innings of one-run ball in a 3-1 victory over the Marlins.
Harang had to settle for a no-decision, but he yielded just six hits and one walk to go along with his 11 punchouts. Remarkably, the right-hander is the first pitcher since Pedro Martinez in 1997 to start a season with five starts of at least six-plus innings and one or fewer runs allowed. He'll take a microscopic 0.85 ERA into a rematch with the Marlins next week.
Ivan Nova's elbow MRI will be sent to Dr. James Andrews.
Nova wants to get a second opinion before deciding whether to undergo season-ending Tommy John reconstructive elbow surgery. Yankees doctors recommended the procedure after examining him Tuesday in New York, and it's a near certainty that he'll be out until 2015.