Peavy had a setback late in the spring while recovering from surgery to his latisimus dorsi muscle, when he developed rotator cuff tendinitis. He missed 10 days of action but returned during the last week of the spring to pitch in an intrasquad game.
"I do feel a lot better going through this process," Peavy said by phone Sunday. "The throwing sessions and the treatments with anti-inflammatories have a lot to do with this."
Peavy will make his next start Friday with Double-A Birmingham. His goal for that outing is 75 pitches and he hopes five innings.
"I look forward to the rehab starts and having more adrenaline," Peavy said about returning to real game action.
His main focus Sunday was on fastball command.
"There are a lot of young guys swinging, and I could get a lot of swings and misses," Peavy said. "But pitching is about fastball command, and that's where it starts."
Peavy pitched his first inning Sunday from the windup and the last three out of the stretch. He wants to get comfortable in the stretch because that means runners are on base and big pitches are a necessity at that point.
After his outing Friday, Peavy will join the team Saturday in Chicago. He is then expected to head out for another minor league outing April 13.
Doug Padilla covers the White Sox for ESPNChicago.com and ESPN 1000.