Buuxi weedha soo socota: Febraayo 26, 2018, McDonagh waxaa lagu kala iibsaday (oo ay weheliyaan J. T. Miller) Tampa Bay Lightning iyada oo lagu beddelay Libor Hájek, Brett Howden, Vladislav Namestnikov, oo ah wareegga koowaad ee 2018 NHL Entry Draft, iyo xulasho wareega labaad oo shuruud ku xiran
Xulashada Ciyaartoyda ee NHL 2019. Isweydaarsiga ayaa daba socday toddobaadyo warar xan ah oo ku saabsan isweydaarsiga oo ay kicisay warqad kooxda u dirtay taageerayaasha Rangers bishii Febraayo 8, 2018, oo ku dhawaaqday dib u dhis. Bishii Abriil 18, 2018, McDonagh wuxuu ciyaaray kulankiisii 100aad ee ciyaaraha NHL.