ANAHEIM, Calif. (AP) -- Ducks center Saku Koivu has returned to Anaheim for tests after taking a hard hit during Sunday's game at Columbus.
The Ducks recalled center Richard Rakell from the AHL on Monday.
Goalie Viktor Fasth also returned to Anaheim for treatment on his lower-body injury.
Koivu was knocked unconscious on a hit by Columbus' Brandon Dubinsky, who was ejected from Anaheim's 4-3 victory over the Blue Jackets. Koivu must be tested and evaluated before he is allowed to return to the Ducks, per NHL protocol.
Fasth hasn't played since Oct. 16. Danish rookie goalie Frederik Andersen has won his first three NHL decisions as Jonas Hiller's backup.
The 20-year-old Rakell played in four games with Anaheim last season.
Anaheim is 2-2 on its eight-game road trip, which continues Tuesday in Philadelphia.