"I knew it was close whether I got through this season or not," Glavine told the Journal-Constitution on Monday. "I always had a feeling in the back of my mind, now more than ever, any time I go out there something could happen. I'm prepared for that. Obviously I'm hoping not to confront it right now, but if I have to, that's the way it is. It's something where I feel better knowing at least I tried."

Glavine signed a one-year contract with the Braves in February in the hopes that he would be able to make a comeback from elbow and shoulder surgery as the fifth starter.

The 305-game winner was scheduled to start for the first time Saturday in Pittsburgh. He was scratched from that start Monday after shoulder soreness shortened a rehabilitation outing Sunday. The Braves will call up left-hander Jo-Jo Reyes from Class AAA Gwinnett to make the start.

Glavine had to leave a start for Class AA Mississippi on Sunday after two innings, having hurt his pitching shoulder swinging in a second-inning at-bat.

"The worst-case scenario would be that the last of my rotator cuff came apart," Glavine said. "I find it hard to believe that would happen in a swing with everything else I've been doing to it."

Glavine reported to spring training with some shoulder "crankiness" but had seen improvement in recent weeks while building his arm strength. He had reported no discomfort while pitching six innings in a simulated game in Gwinnett last Tuesday.

He's still holding out hope that it's scar tissue breaking up.

"I don't know how to describe it or what to think about it," Glavine said. "I hope it's scar tissue. I've never been through a surgery to know what popping scar tissue feels like."

Andrews performed surgery on Glavine in August to repair a torn flexor tendon in his elbow, and he also shaved down frayed edges in his shoulder, of the labrum, rotator cuff and bursa sac.

It's surprising to Glavine and the medical staff that it's his shoulder causing him the biggest issues because that was thought to be the less serious procedure.

"With my shoulder, I'm still eight to nine months removed from surgery," Glavine said. "Maybe there's still some healing that has to take place."

Glavine said he was able to throw some warm-up pitches in the third inning Sunday and throw one pitch to a hitter before taking himself out.

Also, he wasn't in constant pain Monday.

The Braves are trying to remain optimistic but knew they had to make contingency plans for Saturday.

"We don't think this is serious based on the initial information, but we want to let James Andrews tell us exactly what's going on," Braves general manager Frank Wren said.

Glavine wouldn't receive the first of his contract bonuses until he makes the active roster.

The Braves chose to go with Reyes over Charlie Morton or prospect Tommy Hanson from AAA Gwinnett.

"It's a reflection of how he threw this spring," Wren said of Reyes.

Reyes went 2-0 with a 2.08 ERA in four spring training games, including three starts. He showed more confidence on the mound and command of the strike zone than last year, when he endured a seven-game losing streak to finish the season.

Reyes was scheduled to start Wednesday for Gwinnett but will skip that to prepare for Saturday. He allowed five runs, four earned, in six innings of his first start for Gwinnett, a 5-3 loss to the Charlotte Knights.

NEXT FOR Braves

* Who: vs. Marlins

* When: 7 p.m. today

* TV; radio: WPCH; 640 AM, 96.1 FM