Rayner was selected in the AFL Academy in 2017 and despite splitting his toe open was dominant with a three goal performance for Team Daniher in the 20th Anniversary match at the Melbourne Cricket Ground.[4][6] He would back up this performance with a 3 goal game for Vic Metro at the AFL Under-18 Championships, earning him a spot in the Under-18 All-Australian team.[4]
He was drafted by Brisbane with the first overall selection in the 2017 national draft.[7]
AFL career
Rayner made his debut in the twenty-five point loss to St Kilda at Etihad Stadium in the opening round of the 2018 season, recording 8 disposals including his first AFL goal.[8] In round 4, on what was a horror day for the Lions, Rayner was a shining light for the Lions, recording a career-best 22 disposals and kicking his side's second of 2 goals for the day in a 93-point loss against reigning premiers Richmond at the MCG.[9] In the following round in the QClash against Gold Coast, Rayner had a chance to draw the match right on the full-time siren, but he pulled his kick wide to the left for a behind and the Lions were defeated by 5 points.
Rayner received the AFL Rising Star nomination for round 15 after kicking two goals and recording nineteen disposals in the Lions' win over Fremantle at Optus Stadium.[10] Rayner had a chance to win the game against North Melbourne in round 20 after being awarded a free kick on a slight angle 30m from goal, but he attempted a kick around the body and his shot went wide to the right for a behind. The Lions lost by 3 points.[11]
On November 5, 2020, Rayner signed a three-year extension with Brisbane, contracting him until the end of 2023.[12]
^The 2020 season was played with 17 home-and-away matches per team (down from 22) and 16-minute quarters with time on (down from 20-minute quarters with time on) due to the impact of the COVID-19 pandemic.