Left-hander Tom Gorzelanny will make his first start of the season on Sunday in the Cubs' series finale against the Reds, and Ryan Dempster will go in the home opener on Monday against the Milwaukee Brewers at Wrigley Field. After an off-day Tuesday, Randy Wells will pitch on Wednesday and Carlos Zambrano on Thursday.
Silva will then open the three-game series against the Astros and be followed by Dempster on April 17 and Gorzelanny the next day.
Silva came out of Friday's game against the Cincinnati Reds after throwing 71 pitches over six innings. He told pitching coach Larry Rothschild and manager Lou Piniella after the sixth that he was feeling some discomfort. However, Silva told the media after the game that everything was fine.
"He's got some stiffness," Piniella said on Saturday. "He told the trainer and the pitching coach in the dugout and they informed me, and we brought [reliever Justin] Berg into the game. I don't anticipate there will be any problems the next time."
Piniella and Silva met Saturday to make sure they were on the same page.
"I talked to him and said, 'Let's make sure the I's are dotted and the T's are crossed,'" Piniella said.
Silva wasn't sure when the problem began, but it may have been in the fourth, when he tried to make a play on a ball that skipped past him.
Acquired in December from Seattle for Milton Bradley, Silva was limited to eight games last season because of problems with his right shoulder.