Kammala jumla mai zuwa: A cikin kakar 2015-16, Matthias ya fara wasan farko na Maple Leaf a daren farko a cikin rashin nasara 3-1 ga Montreal Canadiens a ranar 7 ga Oktoba, 2015. A cikin shekara, Matthias ya kasa cin kwallo a irin wannan saurin kamar yadda ya gabata a Vancouver, amma har yanzu ana ganinsa a matsayin mai samar da kirki saboda rawar da yake takawa a kungiyar. Bayan ya ba da gudummawa tare da maki 17 a wasanni 51, a ranar 21 ga Fabrairu, 2016, an yi musayar Matthias ta hanyar sake gina Maple Leafs zuwa Colorado Avalanche a musayar zagaye na 4 a cikin
Zaɓen shiga na 2016 da kuma mai yiwuwa Colin Smith.