Hammel is currently throwing on flat ground from 90 feet at his home in Rhode Island and will progress to 120 feet before reporting to Sarasota to continue his rehab.
"They still need to get all that stiffness and discomfort out of there because you don't want to start that too quickly and get a setback," Showalter said.
In other injury news:
-- Second baseman
-- First baseman Nick Johnson, who was rehabbing a right wrist injury in Sarasota, has returned to his home in California. The organization hasn't said it, but it appears he's out for the season.
-- The Orioles won’t know whether designated hitter
-- Right hander Stu Pomeranz (left oblique strain) is threw off a flat mound in Sarasota on Saturday and appears recovered from a back injury that set back his recovery.
Here are tonight's starting lineups:
Omar Quintanilla 2B