Cika wannan jumla: A ranar 15 ga Yuni, 2019, an yi musayar Määttä zuwa Chicago Blackhawks a musayar Dominik Kahun da wani
Zaben zagaye na biyar na 2019. A cikin kakar wasa ta 2019/20, ya zira kwallaye hudu da maki 17 a wasanni 65 tare da Blackhawks, yayin da yake da matsakaicin lokacin 18:25 a kan kankara. A cikin wasanni tara na bayan kakar wasa, ya jagoranci tawagar tare da kimar tara da bakwai kuma ya jagoranci blueline a cikin zira kwallaye tare da kwallaye uku da maki shida.