The NHL's waiver list Monday produced three more players who will likely be bought out of their contracts.
Volchenkov, 32, had two years remaining on his deal paying him $4.25 million each season. He signed a six-year, $25.5 million contract with New Jersey in July 2010.
O'Brien, 30, had one year left on his deal, which was set to pay him $2.2 million for next season.
Gleason, 31, had two years left on his contract, counting $4 million each season against the cap.
All three players will become unrestricted free agents Tuesday.