 Due to his ankle injury, teams were unwilling to give Prust a contract, with concerns continuing to be raised over his foot speed and ankle itself.Going unsigned for the duration of the summer, he agreed to sign a Professional Try Out contract with the Toronto Maple Leafs on August 22, 2016.Prust's main reason for signing the try out was to fulfil his childhood dream of playing for the Maple Leafs, the team he grew up cheering for.