 Added to provide a veteran presence and mentoring role to Connor Ingram, Leighton got off to an average start after winning just three of his nine games.On November 14, 2017, the Lightning traded Leighton (along with Tye McGinn) to the Arizona Coyotes in exchange for Louis Domingue.With the Coyotes' AHL affiliate, the Tucson Roadrunners, already with three rostered goaltending prospects, Leighton was loaned to the Chicago Wolves on November 21, 2017.