The Coyotes have had some injury issues recently, with Alex Galchenyuk, Dylan Strome, Christian Dvorak and Jakob Chychrun all being sidelined at one time or another.
Chychrun is still far from being close to returning, with Galchenyuk and Dvorak also questionable for the immediate future.
Strome, who appears to be ready for the team’s opener against the Dallas Stars, is likely to be played out of position to fill a gap left by an injured player.
Gagner, meanwhile, is a surprising choice for the waiver wire – having signed a three-year deal that pays him $3.