Gold Coast (2012–2016)

O'Meara was recruited by Gold Coast with the first selection in the 2011 mini draft, a special draft of players who were too young to be eligible for selection in the main 2011 AFL Draft. Gold Coast obtained the first selection in the mini draft by trading their first selection, the fourth overall, to the new Greater Western Sydney team.^[6]

As part of the mini-draft rules, O'Meara was unable to play for the Gold Coast Suns in the 2012 season, but did play for them in the 2012 NAB Cup preseason competition and then with the reserve team in the North East Australian Football League.^[7] He underwent groin surgery that prevented him from playing for the rest of the season.^[8]

O'Meara made his debut in the opening round of the 2013 AFL season and was rewarded with the round 5 nomination for the 2013 AFL Rising Star after recording 25 disposals, five marks, four tackles and two goals in the forty-four point win against Greater Western Sydney.^[9] He re-signed with the Suns for a further two seasons midway during the year.^[10] After playing every game for the Suns during his debut season, he was subsequently named the NAB AFL Rising Star for 2013.^[11] Since making his debut in 2013, O'Meara did not miss a game in 2013 and 2014, playing all possible 44 games during that period.

He had an unfortunate start to the 2015 season, as he injured his knee in a NEAFL scratch match that required extensive surgery.^[12] More surgery was required for his patella tendon that eventually resulted in him missing the entire 2015 and 2016 seasons through injury.^[13]

Hawthorn (2017–2022)

O'Meara requested a trade from Gold Coast in August 2016.^[14] In September, he nominated Hawthorn as his preferred destination.^[15] He was officially traded to Hawthorn in October.^[16] O'Meara had an injury-plagued first season at Hawthorn, managing only six games due to ongoing knee problems. O'Meara's knee improved considerably by 2018, and he became a standard fixture in Hawthorn's midfield for that season and 2019. Due to Tom Mitchell's injury preventing him from participating in the latter season, O'Meara was widely seen as Hawthorn's most effective midfielder.^[17][18]

O'Meara was named as one of Hawthorn's two Vice-Captains prior to the 2020 season, along with Mitchell.^[19] O'Meara broke his hand in Round 12 of the season, causing him to miss four games.^[20]

Fremantle (2023–present)

Despite being contracted to Hawthorn for a further year, O'Meara attracted interest from multiple clubs during the 2022 trade period, with interest from GWS and Fremantle, who were seeking a senior player to add to their lists.^[21] O'Meara was eventually traded to Fremantle, allowing him to return to his home state with a four year contract.^[22][23]

Upon joining Fremantle O’Meara was promoted to the clubs leadership group.^[24] O’Meara played his first game for Fremantle in the opening round of the 2023 AFL season. He had 19 disposals and 13 handballs in their 15 point loss to St Kilda. O'Meara kicked two goals the next round against North Melbourne at Optus Stadium.