Manager Fredi Gonzalez says he wants to have Tim Hudson and Mike Minor available for Friday's game against the Cardinals in case Kris Medlen has unexpected problems in the bullpen.
Right-hander Cristhian Martinez, who appeared in 54 games and often was effective in long relief, is not on the 25-man roster. Joining closer Craig Kimbrel in the bullpen are left-handers Luis Avilan and Eric O'Flaherty and right-handers Chad Durbin and Cory Gearrin.
Catcher David Ross is expected to start instead of Brian McCann, who has a sore shoulder and sore knee. A third catcher, J.C. Boscan, also is on the roster.
The roster includes eight infielders and five outfielders.