Sydney Stack

Stack began pre-season training in November 2019 and spent the summer training as a half-back and a small forward. He returned to the club's AFL lineup with appearances in each of the club's two pre-season matches, including a 20-disposal, eight-tackle outing in the final match of the series which also featured a spectacular mark over Greater Western Sydney forward Toby Greene. Stack's performances earned him selection for the season-opening win over Carlton a fortnight later, played under extraordinary conditions imposed on the league as a result of the rapid progression of the coronavirus pandemic into Australia. In what the league planned would be the first of a reduced 17-round season, the match was played without crowds in attendance due to public health prohibitions on large gatherings and with quarter lengths reduced by one fifth in order to reduce the physical load on players who would be expected to play multiple matches with short breaks in the second half of the year. Just three days later, the AFL Commission suspended the season for a period of at least 10 weeks after multiple states enforced quarantine conditions on their borders that effectively ruled out the possibility of continuing the season as planned.

In November 2019, Stack began a relationship with Richmond AFL Women's midfielder Monique Conti.

After earning selection to the Western Australian squad competing at the 2018 AFL Under 18 Championships, Stack was left out of the state's round 1 side for missing a compulsory training session the day after getting into a physical altercation over family disputes at a birthday celebration. He spent just one match on the sidelines however, earning a place in the tournaments second round where he was one of the state's best players with 23 disposals and four clearances. In a later match against Vic Country, Stack recorded 22 disposals, thanks largely to a prolific second half performance. At the end of the tournament Stack was named All-Australian after he held an average of 21.3 disposals per match playing as a midfielder.

In 2018 he also played three senior-level WAFL matches for Perth, and while playing at Colts level he received the club best and fairest award and was named in the WAFL Colts Team of the Year.

Prior to the 2018 AFL draft Stack was lauded for his ability to apply on-ball pressure, for his composure in traffic and his clean ball use and well as his physical traits of speed and acceleration.

Despite those predictions, Stack was ultimately passed on by all 18 AFL clubs at the national and rookie drafts in 2018 due to concerns over his fitness and dedication to training standards.

In the days following the 2018 draft, Stack was offered a chance to train with Richmond under a trial period basis. He moved to Melbourne in December 2018 and temporarily moved in with the family of coach Damien Hardwick. Stack impressed during his trial and in February 2019, was signed by the club under the AFL's newly introduced pre-season supplemental selection rules.

He played junior football at the local Barons and Federals Football Clubs in Northam, and attended high school at Northam Senior High School through the end of year 11 classes. During his late teenage years Stack faced housing uncertainly, spending most of a two year period moving between living with extended family members, friends and his manager. At that time, Stack played Colts football for Perth in the junior ranks of the WAFL including in 2017 where he held averages of 18 disposals per game. Later that year he represented Western Australia at the 2017 2017 AFL Under 18 Championships. Despite being younger than most of those selected, Stack earned a spot in each of the side's four matches at the tournament, kicking two goals. He also traveled to New Zealand as part of a junior Australian team that played the New Zealand national senior team in an exhibition match in April 2017. At the end of the 2017 season Stack played in a under 17s exhibition match at Simonds Stadium in Geelong.

Sydney Stack (born 28 April 2000) is a professional Australian rules footballer playing for the Richmond Football Club in the Australian Football League (AFL). He played junior representative football with Perth in the WAFL and represented Western Australia at national championships at under 18 level where he was named All-Australian in 2018. After being undrafted in 2018, Stack was signed by Richmond as a supplemental selection in 2019 and made his AFL debut in round 3, 2019.

In a late-October mock draft, ESPN predicted Stack to be taken with the 28th pick in the upcoming AFL draft, while in their draft-week predictions, Draft Central and Fox Footy forecast Stack to be selected with the 36th and 53rd overall picks respectively.