23 Febraayo 2018, Penguins waxay Gustavsson ku iibsadeen Ottawa Senators (oo ay weheliyaan Ian Cole, 2018
xulashada wareega koowaad, iyo xulashada wareega saddexaad ee 2019) oo lagu beddelay Derick Brassard. Bishii Maarso 23, 2018, Gustavsson waxaa loo qoondeeyay Senators AHL, Belleville Senators, ka dib markii la soo gabagabeeyay xilli ciyaareedka SHL.