PHOENIX -- The Giants appeared to be in scramble mode before the season opener on Monday. A day later, they're hoping to have found some normalcy in the rotation.
Jake Peavy (back tightness) threw a bullpen session Tuesday afternoon and is on track to make his season debut on Sunday in San Diego. Peavy was one of two Giants starters to be scratched from the season's first three games and the other, Matt Cain, could be back sooner than first expected. Cain will head back to San Francisco to have his flexor tendon strain reevaluated and manager Bruce Bochy said the hope remains that this is a short-term injury. The Giants are looking for a diagnosis of two to three weeks of rehab.
"It's unfortunate for Matty because he worked so hard to get back on the mound and he had a little hiccup," Bochy said. "Hopefully it won't be too long."
Chris Heston starts for Cain on Wednesday. Bochy could have moved Tim Lincecum up in the rotation but decided that it was best to not move too many parts. (Left unsaid: The twice-no-hit Padres are a much better matchup for Lincecum than the fighting Goldschmidts.)
"We decided to keep things in some kind of order for these guys," Bochy said. "It really works out fine this way."
If all goes according to plan, the Giants could have four of their five planned starters in place for the second turn of the rotation. Ryan Vogelsong seems a good bet to stay in Cain's spot, meaning he would start the home opener next Monday. Bochy wouldn't commit to that plan yet, saying he didn't want Heston thinking about his future as he made his second big league start.
"I just want him to go out there and pitch," Bochy said. "He knows what he's doing out there. He's got good stuff. He's a four-pitch guy with command and he's got good movement. He's a good athlete."
--- Casey McGehee had two hits in his Giants debut. In the dugout, his manager had a smile on his face. McGehee had slumped toward the end of the spring.
"I think he was pressing. He admitted he was pressing a little," Bochy said. "He's trying to make a good impression coming over here. I thought that last at-bat in the (Bay Bridge Series) settled him down. He's a good hitter."
Whether McGehee likes it or not, he will be directly compared to Pablo Sandoval. The former Giants third baseman was 0-for-5 in his Red Sox debut with three strikeouts.