According to ESPN's Peter Gammons:
The Red Sox say the backup/Tim Wakefield catching job has been won by George Kottaras, but they are still looking for another catcher. The Diamondbacks, who would like another starting pitcher, continue to insist on Michael Bowden for Miguel Montero, and Boston GM Theo Epstein still won't trade Bowden.
Montero, 25, hit .255/.330/.435 last year in 207 plate appearances as Chris Snyder's backup. He threw out 18.2% of attempted base-stealers. Meanwhile Bowden, 22, tossed 144.3 innings in the minors last year with a 2.62 ERA. Baseball America called him "a safe bet with a good chance to become a No.3 starter."