"I talked to him [Tuesday]," Amaro said. "He's pretty positive."
If everything goes well, Halladay could pitch again for the Phillies as early as late August.
Amaro also said left-hander John Lannan, who is on the disabled list with an injured left knee, is scheduled to throw to hitters next Wednesday in Clearwater. Amaro said Lannan "is doing very well. He feels good."
Right-hander Carlos Zambrano is scheduled to throw in an extended spring game Thursday in Clearwater.
Todd Zolecki is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.