The Toronto Maple Leafs only made one move on deadline day in 2019, and it was to bring winger Nic Petan to Toronto from the Winnipeg Jets*, in exchange for sometimes fourth line centre Par Lindholm. Moving Lindholm gave Frederik Gauthier the bottom centre role, and bringing in Petan gave Justin Holl a friend to share the press box with.
I like to kid, but this move was about giving Justin a friend. Petan played only five games for the Maple Leafs after coming over from Winnipeg, and all were in the regular season.