Ku qor sii wadida faqradan - Sida wakiil xor ah xilli ciyaareedka, McKenna wuxuu sii dheereeyay xirfadiisa isagoo ogolaaday qandaraas hal sano ah oo laba dhinac ah oo uu la galay Ottawa Senators bishii Luulyo 1, 2018. Wuxuu ku biiray AHL, Belleville Senators si uu u bilaabo xilli ciyaareedka 2018-19. Kadib lix ciyaarood oo uu la ciyaaray Belleville, McKenna waxaa dib ugu yeeray Ottawa. Wuxuu u soo muuqday 10 ciyaarood Senators, isagoo soo bandhigay rikoor 1-4-1 ka hor inta aan lagu kala iibsan Tom Pyatt iyo 2019
Wareegga lixaad ee doorashada Vancouver Canucks iyada oo lagu beddelay Anders Nilsson iyo Darren Archibald Janaayo 2, 2019. Waxaa laga saaray ka dib markii uu taageeray Jacob Markström laba ciyaarood, iyada oo ujeedada Canucks ay ahayd in dib loogu celiyo kooxda AHL, Utica Comets. Waxaa si dhakhso leh loogu dalbaday ka dhaafista Philadelphia Flyers maadaama ay wax ka qabteen dhaawacyada goolhayaha Brian Elliott, Michal Neuvirth, iyo Anthony Stolarz. McKenna wuxuu markii ugu horreysay u saftay Flyers bishii Janaayo 8, 2019 oo ay la ciyaareen Washington Capitals. Wuxuu ahaa goolhayaha toddobaad ee u bilaabmay Flyers xilli ciyaareedkii 2018-19 ciyaartii 43aad oo keliya. Bishii Janaayo 30, 2019, McKenna wuxuu ogolaaday amaah 14-maalmood ah oo uu la leeyahay Lehigh Valley Phantoms. Wuxuu u dhaqaaqay 2-1 inta lagu gudajiray inta uu u ciyaarayo rikoodhka AHL-ta 13aad ee rikoodhka.