The Colorado Avalanche players who received qualifying offers were Tyson Barrie, Mikhail Grigerenko, Nathan MacKinnon, Calvin Pickard and Duncan Siemens. These players were facing restricted free agency. The Avalanche are trying to keep them, so this is one way. But the players need to accept the offer.
Here is a little information about a qualifying offer. A player who is no longer considered entry level but does not qualify to be an unrestricted free agent is a restrected free agent. The current team must extend qualifying to restricted free agents in order to retain their negotiating rights.
The player is under the age of 27 with less than 7 years of service time.