Career with Fremantle (2010–12) Roberton started the 2010 season playing for
East Perth in the
WAFL and was named to make his AFL debut for Fremantle in the Round 6
Western Derby. In 2011 he was used as Fremantle's first ever substitute player in their opening round match against the
Brisbane Lions, replacing
Rhys Palmer in the third quarter.
Career with St Kilda (2013–2021) At the end of the 2012 season, Roberton requested a trade from the Dockers to a Melbourne-based team. When a trade did not eventuate he was delisted by Fremantle and then invited to train with
St Kilda. He was signed as a "delisted free agent" on 30 November 2012 by the Saints. In 2017, Roberton was named in the 40-man
All-Australian team squad as one of the best rebounding defenders in the league. Roberton also capped a brilliant season, finishing second in the
Trevor Barker Award. He also extended his contract for another four years, until the end of the 2021 season. In Round 4 2018, Roberton collapsed on the field in a game against Geelong at Kardinia Park. It was determined that Roberton was suffering from a heart condition, and he was unable to retake the field. Roberton’s heart rate had soared to around 300 beats per minute which is more than 100 beats per minute beyond the max heart rate of a person of his age. Roberton ultimately did not return to football in 2018. In a pre-season game in 2019 in Ballarat, Roberton felt unwell and missed the rest of the match. He did not play the 2019 season. Roberton returned to the leadership group ahead of the 2020 season. Roberton played in the Saints' Round 1 clash against North Melbourne, his first AFL-level game since his collapse in 2018. However, Roberton did not play at AFL level again in 2020 following the resumption of the season following the
Coronavirus hiatus from April to June. In early January 2021 defender Roberton announced he was taking a break from his footballing duties to consider his future in football. Roberton has been attempting to make a full return to football following a collapse as a result of a heart condition in Round 4 2018. Roberton ultimately announced his retirement from the game on 6 March, stating that "I've come to a point where I need to put my family and future first...after lengthy discussions with my family and on the advice of my doctors, I've made the extremely hard decision to hang up the boots." ==Coaching==