Quaynor was part of Collingwood's
Next Generation Academy and won the goal kicking test at the
Draft Combine. The club drafted him to their AFL squad with the 13th draft pick of the
2018 AFL draft. As Collingwood's first pick of the draft, he wore the number 35 guernsey in his first season. Quaynor made his AFL debut in Collingwood's loss against
Hawthorn in the 16th round of the
2019 AFL season. In the 17th round of the
2020 AFL season, Quaynor was nominated for the
AFL Rising Star award. In
2021 Quaynor became a regular player in Collingwood's lineup each week. In 2023, Quaynor was named in the initial
All-Australian squad of 44 for the first time. Prior to the
2024 AFL season, Quaynor was named as part of the Collingwood leadership group, being announced as one of Collingwood's vice-captains. Playing
Adelaide at their
home grounds in the
2025 AFL season 1st preliminary final, Quaynor was repeatedly booed by fans. Quaynor was believed to be the Collingwood player against whom
Izak Rankine used a homophobic slur, leading to Rankine's four-match suspension, ongoing at the time of the match. ==Statistics==