Halladay has been on the disabled list since May 28 because of a strained right latissimus dorsi, but he said he has been progressing well. He is scheduled to throw his third bullpen session Saturday at Citizens Bank Park.
The Phillies have indicated Halladay could rejoin the rotation without making a rehab start, which would be unusual considering how much time he has missed, but Phillies general manager Ruben Amaro Jr. said Thursday he likely will have one.
"I think he's going to have to have some kind of rehab," Amaro said. "We can set up some things where he does simulated stuff, too. He's probably better off having some sort of rehab. We'll see how he feels Saturday, and we'll figure out where we go from there."