Wang, who had been under consideration to start opening day April 2 against Tampa Bay, is expected to be sidelined at least a month.

''You're talking late April,'' Yankees general manager Brian Cashman said today. ''You don't want stuff like that to happen, but unfortunately it does happen. When they happen, you handle it.''

Wang was hurt while sprinting Friday.

''I feel one pop, pull,'' Wang said. ''Very sad. I hope it gets better.''

Wang will be placed on the disabled list when the Yankees break camp next weekend. He will remain at the Yankees' spring training complex for rehab.

Cashman said there are no plans to look outside the organization to fill the roster spot. Candidates include Jeff Karstens and Darrell Rasner.

''We have depth. We have choices,'' Cashman said. ''It's a short-term issue that you're dealing with. Somebody else will get an opportunity.''

Another potential opening day starter, left-hander Andy Pettitte, has resumed throwing after being sidelined Monday by back spasms.

Cashman said he expects Pettitte to be ready for the start of the season.

''I know every day he's feeling better,'' Cashman said. ''Obviously I'd like to see him back on a mound throwing well. All in due time.''