If and when Koji Uehara lands on the disabled list, the Orioles have to decide who replaces him in the bullpen. The answer could be David Hernandez, who allowed just one hit and run in his first win of the season Friday.
But Hernandez (1-5, 5.331 ERA) has pitched six innings or more just twice in eight starts and could be moved to the bullpen to give the club another pitcher who can throw multiple innings.
That would allow the Orioles to recall either Chris Tillman (4-4, 3.31 ERA) or Jake Arrieta (4-2, 1.93 ERA) from Triple-A Norfolk and insert one into Hernandez's spot.
The Orioles aren't tipping their hand yet.
"We know what the possibilities are, but to be very honest with you, I couldn't tell you what we are going to do," Trembley said. "I know this, what you don't need is another guy in the bullpen that throws one inning. That's what you don't need. You need somebody that can give you multiple innings."
Hernandez's next start is scheduled for Thursday against the Oakland A's at home.