"He's improved. The plan of care is not going to change," Amaro said. "The plan was to have him start throwing in November. He's not 100 percent ready to throw yet, which we didn't plan on having him be at this point anyway."
Lee is set to return to Philly during the last homestand of the season that begins on Sept. 26 to be re-examined.
"Cliff is going to come back for another exam at the very end of the year," Amaro said. "We'll see him one more time at our last homestand, and then he'll continue doing whatever his rehab is up until then. Come back, be examined again, and then we'll go from there."
Amaro said he was confident that Lee will be a contributor in 2015.
• Amaro reiterated that there's no timeline for Jimmy Rollin's return from a mild left hamstring strain that he suffered on Monday night, but that he continues to progress and upped his activity on Wednesday.
"He's improved today," Amaro said. "I think he's going to do a little bit more activity today. I don't know if he's going to do baseball activity. I don't think he's ready to do that. But I just talked to him and he said he's much improved from [Monday] and improved from [Tuesday]. So he's progressing."
Erik Bacharach is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.