Kammala jumla mai zuwa: A ranar 23 ga Fabrairun 2018, Penguins sun yi musayar Gustavsson zuwa Ottawa Senators (tare da Ian Cole, wani
Zaɓin zagaye na farko na 2018, da zagaye na uku na 2019) a musayar Derick Brassard. A ranar 23 ga Maris, 2018, an sanya Gustavsson zuwa reshen AHL na Senators, Belleville Senators, bayan kammala kakar SHL.