 On 5 August 2017, Maynard made his AFL debut in Melbourne's 97–62 loss to the Greater Western Sydney Giants in Canberra.He had 18 disposals and kicked a goal against the Giants, with coach Simon Goodwin saying Maynard did everything that could've been expected from him in his first AFL game.Maynard's 2018 season was limited due to injury, with hip surgery in June ending his season.