The exhibition schedule begins Thursday and Grapefruit League play starts Friday, but it could be a few more days before Shane Victorino is on the field for the Red Sox. Manager John Farrell said the Sox are holding Victorino out of action for a while as Victorino builds some core strength. "He went through two really good days of work,'' said Farrell, "and coming out of swinging the bat off the tee, soft toss and some light BP, we thought there were some other things that we needed to address, just from core strengthening and he's going through that right now. "We don't have a date right now where he'd be in games. There's some other work we've got to take care of first.'' Farrell stressed that the concerns are not related to the right hand/thumb surgery Victorino underwent during the off-season.