The most uncertain spot on the team is the bullpen, where the only players under contract are closer Brad Lidge, setup man Ryan Madson and righthander Danys Baez, who struggled in 2010 and was left off the postseason roster. The Phillies have a number of young arms under their control who will compete for spots, including postseason-roster members David Herndon and Antonio Bastardo.
Durbin, an under-the-radar signing who has played a big role for the team over the last three seasons, does not have a good read on his chances of returning.