Calgary Flames defenceman Shane O'Brien and Detroit Red Wings forward Mikael Samuelsson were both placed on waivers by their clubs on Saturday.
NHL teams have until Noon eastern on Sunday to claim the players.
O'Brien, 30, has three assists and 58 penalty minutes in 45 games for the Flames this season.
The seven-year NHL veteran was acquired from the Colorado Avalanche in a four-player trade last June.
Samuelsson, 37, has played 12 NHL seasons and has one goal and two assists this year in 26 games for Detroit. He has been a frequent healthy scratch and has not played since Jan. 16.