"It's definitely good news," manager Clint Hurdle said. "Nothing more serious. We'll slow him down a bit, and hopefully resume his rehab shortly."
Morton is scheduled to play some flat-ground catch on Tuesday at PNC Park, then travel with the club for next weekend's series in New York with the Mets and throw a bullpen session in Citi Field.
"Following that, we hope to resume his rehab," said Hurdle, who qualified any perceptions that the development is a setback to Morton's comeback from Tommy John surgery.
"It isn't. Because you don't know ... you just keep moving forward and deal with what you have to deal with," Hurdle said. "It's the next challenge in his rehab. He was alarmed by what he felt, and it was proper to shut him down -- but he understands it's just something he has to push through."
Tom Singer is a reporter for MLB.com and writes an MLBlog Change for a Nickel. He can also be found on Twitter @Tom_Singer. This story was not subject to the approval of Major League Baseball or its clubs.