As ESPN's Jayson Stark notes in his latest column, Boston's 2012 rotation posted the worst ERA of any Red Sox rotation in history at 5.19. Stark's colleague Gordon Edes writes that despite the strong Spring Training performances of the projected rotation, the team is still on the lookout for organizational depth in the rotation.
The projected rotation of Jon Lester, Ryan Dempster, Clay Buchholz, Felix Doubront and John Lackey are enjoying a strong Spring, but manager John Farrell told Edes that the organization is lacking depth in terms of pitchers who already have Major League experience. Franklin Morales is one such player who has that experience, but he's out indefinitely with a bulging disk in his back. Alfredo Aceves also has big league experience, but beyond that the options are thin.
Given that their rotation is already set, GM Ben Cherington is likely eyeing experienced veterans he could stash at Triple-A. As MLBTR's Transaction Tracker shows, Chris Young (currently with the Nationals) and Justin Germano (Blue Jays) are just a couple of the veteran starters that signed minor league deals this offseason but won't break camp on Major League rosters. Many players that are still free agents are currently injured, although Chien-Ming Wang enjoyed a healthy, productive World Baseball Classic. Bear in mind, of course, that these names are all my own speculation, as opposed to pitchers that Edes specifically connected to the Red Sox.