He won the All-Ireland Senior Football Championship for Tyrone in 2021 and the AFL Premiership playing for Brisbane in 2024, becoming only the second player to do so after Tadhg Kennelly.

There he played Gaelic football for Eglish St Patrick's and the Tyrone county team (minor level).

[18] The following month, McKenna made his first start for Tyrone against Donegal as the 2020 National Football League resumed after a long suspension caused by the impact of the COVID-19 pandemic on Gaelic games.

[19] In his second game McKenna scored two goals that helped relegate Mayo, in what was that county's first time to be knocked out of the top flight in 23 years.

[21] When Tyrone then defeated Mayo in the 2021 All-Ireland Senior Football Championship Final, McKenna became the fourth former AFL player to win the Sam Maguire Cup (and the first since Tadhg Kennelly in 2009).

[23] McKenna made his Brisbane debut against Port Adelaide in Round 1, kicking one goal and racking up 20 disposals in a 54-point defeat.

McKenna was part of the Brisbane Lions 2024 premiership winning team, starting the match as the substitute in a 60 point victory over the Sydney Swans.