In 2016 she arrived in Melbourne while travelling Australia and joined the Melbourne University Football Club where she learned to play with the oval ball.[2] Shortly afterward she and Irish international Laura Duryea joined the Diamond Creek Football Club. Fitzpatrick's game developed quickly and she became one of the best Irish players in Australia receiving a call up, along with Duryea, for Ireland's women's national team, the Banshees for the 2017 Australian Football International Cup as a ruck.[5] She was part of the side that defeated Canada in the final to take the trophy and was named in the Women's World Team, alongside Duryea, in the ruck.[6]
She made her debut against Western Bulldogs at RSEA Park in the opening round of the 2020 season.[8] In June 2021, she was delisted by the club after missing the 2021 AFL Women's season due to visa issues.[9] In June 2022, after being not listed for a season, Fitzpatrick returned to St Kilda.[10]
In March 2023, Fitzpatrick was traded to the Gold Coast as part of a five-club deal.[11]