The Red Sox are planning to carry Felix Doubront over Matt Thornton for the final spot in their ALDS roster, a source told CSNNE.com's Sean McAdam. Thornton is the proven reliever, but he's given up 22 hits and struck out just nine in 15 1/3 innings since coming over from the White Sox. The Red Sox will try Doubront instead and hope that his success starting carries over to the pen. They'll have three left-handed relievers in all, with Craig Breslow and Franklin Morales also occupying spots.