Manager Dave Trembley was asked to clarify his bullpen blueprint during his pregame news conference. Nothing he said should come as a big surprise, since you've basically seen the way he's using each pitcher over the course of the first three weeks of the season.

"The way I see it, it's Ray, Johnson and Sherrill in the seventh, eighth and ninth,'' Trembley said. "Walker is the situational guy who can finish an inning and come back for the next one if there's a left-hander leading off."

Trembley revealed on Thursday night that he told Matt Albers to be prepared to be the first guy up if the starter unravels in the third or fourth inning. Brian Bass also will pitch in that role, but has gotten a couple of ninth-inning appearances in non-save situations to build his confidence after some rough early outings.

"One (reason) is confidence,'' Trembley said. "The other is to have him feel what it's like to be out there at the end of the game...to be the guy shaking hands."

Melvin Mora is set to take batting practice and participate in drills before tonight's game. Then a determination will be made whether to send him out on a quick injury rehabilitation assignment.

"I plan to talk to him and see where he's at,'' Trembley said. "He may go out and play in a couple of games, but I don't know where."

Rich Hill update: Hill is scheduled to make his first injury rehabilitation start tonight at Frederick. He'll be limited to about 65 pitches.