Both were activated before the team's game Friday night against the Vancouver Canucks.
Galiardi has missed nine games since injuring his ankle Oct. 28 at Calgary. He has one goal and five assists for Colorado this season.
Liles missed five games after injuring his shoulder Nov. 6 against Chicago. He has two goals and three assists for the Avalanche this season.
The Avalanche also reassigned forward Chris Durno to the Lake Erie Monsters of the American Hockey League on Friday and placed forward Matt Hendricks on the injured reserve list retroactive to Nov. 14 with a groin injury.
I've got a lot of experience and there's a lot of young guys. It's even making me excited a little more. It's kind of a new life. At my age, I feel like I know a lot of things what to do, but I just cannot do it anymore. It's a lot easier to tell them what to do because they've still got the legs and hands to do it. I just know things, but I cannot do them anymore.
— Jaromir Jagr after making his Panthers debut in a win against the Sabres on Saturday