Over the offseason, Roy Oswalt was picky. Really picky. He wanted to pitch for the major-league team that played in Mississippi at first. His agent finally convinced him that was impossible. So he expanded his preferences to teams close to his Mississippi home. And finally, he said "to heck with this", and decided to kick back during the spring when all the suckers were busy training.
But he could come back soon. From Ken Rosenthal:
The Philadelphia Phillies were Oswalt's last team, and it appeared in the offseason that they weren't going to have room in the rotation. But Vance Worley's recent elbow concerns have probably made the Phillies explore other options.
The Boston Red Sox seemed like the best fit for Oswalt in the offseason, but he didn't appear particularly keen on pitching a full season that far away from home. For a half-season, though, he apparently will be open to the idea.