Glavine said he threw 33-35 pitches before Wednesday's game against the New York Mets, with bullpen coach Eddie Perez standing in as a batter. The 43-year-old left-hander, on the disabled list since the start of the season following elbow and shoulder surgery last August, said he only missed location with two pitches.
"The key is going to be first and foremost: Am I having pain when I make pitches that doesn't allow me to make my pitches? So far, I haven't had that," he said. "The second part of that is going to be, you know, do I get sore, so sore in between starts that, you know, I can't do anything or I'm not sure whether or not I'm going to make my next start?"
Then he answered himself.
"So far, both of those have been good," he said.
After Glavine stopped a minor league rehab start April 12, the two-time NL Cy Young Award winner was diagnosed two days later with inflammation in his left rotator cuff. He wasn't sure of his next step.
"It's just a question of, you know, trying to figure out am I better off continuing to build arm strength and volume in a controlled atmosphere versus going to pitch in a rehab game and pitching two or three innings," he said.
Glavine was projected to open the season as Atlanta's No. 5 starter before experiencing shoulder pain.
"In my mind, I'd love to be ready to pitch in a game, you know, by the end of the month," he said. "It's certainly not a hard timetable."
He wants to see how his arm responds.
"I'm at that stage where you just don't know. Based on how I threw, yeah, I'm very confident. How will I feel tomorrow? That's the part I don't know. That's the part I've never had to worry about, but now I do," he said.
Glavine, whose first big league season was with the Braves in 1987, won't rule out trying to stay with the Braves in 2010.
"If I pitch the rest of the year and I've pitched well and I'm healthy, then yeah, I'd be open to it," he said. "But, you know, look, this organization has got a lot of young studs knocking on the door, so I don't know how much room there is here left for me."