"Yovani is going to throw [on Friday], and he'll pitch on the 13th for Norfolk in Charlotte," Showalter said. "He'll fly out of here on Sunday for that game on Monday, it's a night game, 7:05 [ET]. Hopefully that will be enough, and he can join us on the 18th."
Monday will mark the 30-year-old's third rehab appearance. Gallardo also pitched three innings for Class A Advanced Frederick on June 2, giving up three runs.
"[We] felt it would be good for him to get one more [start]," Showalter said. "He's real close. [Pitching coach Dave Wallace] and I sat down the last couple days and talked to him. We'll see how the work day goes tomorrow, but we think that's the most prudent thing to do with his injury and making sure he has some of that doubt out of his mind, too."
Gallardo, who is 1-1 with a 7.00 ERA with the Orioles, is working his way back from biceps tendinitis suffered in late April.
Dhiren Mahiban is a contributor to MLB.com based in Toronto. This story was not subject to the approval of Major League Baseball or its clubs.