In the 2018 offseason, Daw changed his position from a forward to a defender. Daw sought this change as he thought it was his last chance at thriving in the AFL. Majak played his first game as a defender against Carlton in the AFLX series. Later on in round 3 against Melbourne, Daw officially played his first game as a defender. Since debuting in his first game as a defender Daw has led North Melbourne to the number-2 defense in the AFL.
On 18 December 2018 Daw abandoned his vehicle on the Bolte Bridge and jumped into the Yarra River 25 metres (82 ft) below. Motorists on the bridge raised the alarm around 11 pm and he was recovered from the river by police and paramedics. He suffered broken hips and pelvis. In July 2019, Daw made a return for the North Melbourne VFL affiliate against Sandringham, the VFL affiliate of St Kilda. Daw made his AFL return on 1 August 2020 in a win against Adelaide, kicking one goal.