The 35-year-old right-hander pitched on flat ground on Sunday, two days after throwing 33 pitches during his first bullpen session since he landed on the disabled list in May with a strained latissimus dorsi in his back.
"I don't know exactly where I'm going to fall during the break, but I'd like to be back as soon after that as I can," Halladay said. "Like I said, this whole process we've been going really day to day, so there's really not [a set date]. Everything's gone really good, so it's the next stop and go from there.
"I think that's a good way to approach it. You get caught up in setting up a day and you're a little more sore than you anticipate and you get yourself in trouble. I think we'll keep going day to day. I feel good, I haven't been sore yet, so we'll keep advancing it and get as close to getting in a game as I can."
Halladay went 4-5 with a 3.98 ERA in 72 1/3 innings and 11 starts before going on the DL. According to the pitcher, his strength was "all well-taken care of before we started throwing."
Symptom-free, the eight-time All-Star and two-time Cy Young Award winner said it's "just a matter of getting pitches back up, getting us throwing off the mound and getting the pitch count built up."
Pitching coach Rich Dubee and Halladay anticipate an extended bullpen session sometime during the upcoming Mets series in New York.
"I felt really good," Halladay said. "I didn't have any soreness or anything, so we'll jump it next time and evaluate from there, but we wanted to do flat ground today kind of in between and then go from there."
Christina De Nicola is a contributor to MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.