Roy Halladay took the next step in his recovery from a strained lat muscle in the back of his shoulder by throwing his first bullpen session Friday.

Phillies pitching coach Rich Dubee said Halladay's bullpen session came "probably a few days early." But Dubee insisted that Halladay is not being rushed, and that Halladay is basically going on his own schedule.

Halladay threw 33 pitches, using all of his pitches. Dubee was encouraged by what he saw.

"I've always been encouraged, ever since he started throwing the ball," Dubee said. "We're talking about a different animal. He might be a few days quicker than the doctors thought, but his work ethic might have something to do with it."

Halladay was initially given a 6-8 week time frame when he suffered the injury May 27, when he left his start against St. Louis after two innings.

Dubee wouldn't say whether Halladay is ahead of that pace, although six weeks would have him coming back the week of the All-Star break. Dubee wouldn't say when Halladay would throw next, although it won't be today.