BUFFALO, N.Y. -- The Buffalo Sabres traded veteran defenseman Marco Scandella to the Montreal Canadiens and acquired forward Michael Frolik from the Calgary Flames on Thursday.

Buffalo acquired a fourth-round draft pick from Montreal and sent it to the Flames.

Trading Scandella allowed Buffalo to free up space under the salary cap while opening room on its crowded blue line. The deal cleared the way for the Sabres to add much-needed forward depth in Frolik, who's production has dropped this season.

Frolik has just five goals and five assists in 38 games with the Flames after scoring 15 or more eight times in 12 NHL seasons.

Scandella, 29, is in the final year of a five-year, $20 million contract and eligible to become an unrestricted free agent following this season. He's a 10-year veteran who was acquired by Buffalo in a multiplayer deal with the Minnesota Wild following the 2016-17 season.

The trade comes as the Sabres are slumping and players are complaining about ice time. Defenseman Zach Bogosian asked to be traded last month and was followed by third-line forward Evan Rodrigues, who went public with his trade request Tuesday.

Scandella is a defensive-minded player who had three goals and nine points in 31 games this season.

At 6-foot-3, Scandella provides additional size to a Canadiens' blue line that already includes Shea Weber.

Montreal also acquired forward Andrew Sturtz and a fifth-round pick in 2021 from Ottawa for defenseman Mike Reilly on Thursday.

The Sabres benefit by freeing his $4 million hit against the salary cap. Buffalo was also carrying eight defensemen on its roster -- one more than usual.

Frolik, 31, is also in the final year of a five-year, $21 million contract.

Buffalo has lost four straight and is 1-6-1 in its past eight entering its home game against the Edmonton Oilers on Thursday night.