Lynch was recruited by St Kilda from Sandringham Dragons Under 18 TAC Cup team with pick 13 in the 2008 National Draft.

[8] In 2014, however, Lynch suffered a wretched run of injuries, including a dislocated shoulder in a pre-season trial game;[9] a broken jaw in a collision with Melbourne's Jack Viney in round 7,[10] and, after a late-season return, a season-ending fractured neck in a collision against the Brisbane Lions in Round 20.

[13] Later in the season, Lynch was hospitalized with viral meningitis, but he bounced back from it in Round 17 against Melbourne, managing 27 possessions, 11 marks and three goals for the match.

He was later signed to the club's list ahead of the 2022 AFL season as part of the supplemental selection period (SSP).

[citation needed] In October 2022 Lynch was awarded the full time VFL senior coaching position of the North Melbourne Football Club.