Carolina released Gagner on Sunday from his professional tryout agreement, Chris Johnston of The Athletic reports.
Gagner scored a goal on two shots and added two assists and a plus-3 rating in Saturday's preseason win over the Predators.
Gagner will take part in training camp with Carolina on a professional tryout agreement, Walt Ruff of the Hurricanes' official site reports Tuesday.
Gagner was called up from AHL Bakersfield on Wednesday, Jason Gregor of Sports 1440 Edmonton reports.
Gagner was reassigned to AHL Bakersfield on Wednesday, per Daniel Nugent-Bowman of The Athletic.
Gagner is expected to remain in the NHL if he clears waivers Wednesday, Daniel Nugent-Bowman of The Athletic reports.
Gagner was placed on waivers Tuesday by Edmonton.
Gagner has been scratched for six of the Oilers' 10 games in February.
Gagner scored a goal on two shots in Saturday's 3-1 win over the Flames.
Gagner (undisclosed) will be in action versus Seattle on Thursday, Mark Spector of Sportsnet reports.