The chances of Manny Ramirez playing on Boston's current homestand appear dim due to the slow-healing nature of oblique injuries. The Red Sox left fielder, who strained his left oblique Tuesday at Yankee Stadium, underwent an MRI test yesterday, and manager Terry Francona said it?s far too early to determine when he will be ready to return. ?How long is he going to be out? I don?t think anybody knows,? said Francona, who indicated that test results weren?t immediately available. ?I don?t know (if) it?s going to be today or tomorrow, though I don?t think it?s fair to Manny to expect that. These type of things can be a week, they can be two weeks. You don?t know. The one thing I?ll promise you is the minute he can play, he will."