Cika wannan magana: A ranar 5 ga watan Maris, 2014, an sayar da Mitchell zuwa Buffalo Sabres, tare da zagaye na biyu na zagaye a
2014 da zagaye na biyu a 2016 (an yi musayar zuwa Montreal don Josh Gorges), a musayar Matt Moulson da Cody McCormick. Mitchell ya gama kakar wasa da kwallaye 2 da maki 10 a wasanni 67.