G Cory Schneider and F Patrik Elias both recently underwent surgery, the Devils announced.
Schneider had successful surgery to repair a core muscle injury and his expected recovery time is roughly six weeks.
Elias had successful surgery on his right knee, but the Devils did not provide a timetable for his recovery.
Schneider, 30, started 58 games and went 27-25 with a 2.15 GAA this season.
Elias, 40, played in just 16 games this season, notching two goals and six assists.