Finlay Patric Armstrong (born 5 March 2003) is an English footballer who plays as a full back for League of Ireland Premier Division club Waterford.
Born in Liverpool, Armstrong started his career, for non League club Venny Boyz, then joined the academy of Burnley at under-13s level, progressing through the ranks to sign a professional one-year contract in July 2022. Prior to signing his contract while under scholarship, he spent time on loan with Padiham and Clitheroe. During the 2022âÂÂ23 season, he was loaned out to FC United of Manchester and Curzon Ashton.
On 30 June 2023, Armstrong joined League One club Fleetwood Town on a one-year deal, joining the club's development squad. He made his debut for the club on 5 September 2023, featuring as a first-half substitute in an EFL Trophy victory over Tranmere Rovers. In December 2023, he joined National League club Rochdale on a one-month loan deal. He was released by Fleetwood at the end of the 2023âÂÂ24 season.
On 6 June 2024, Armstrong agreed to return to Rochdale on a permanent two-year deal upon the expiration of his contract with Fleetwood.
On 24 January 2025, Armstrong joined National League North side King's Lynn Town on an initial one-month loan deal.
On 8 July 2025, Armstrong signed an 18 month contract with League of Ireland Premier Division club Waterford.
Armstrong is the older brother of Everton midfielder Harrison Armstrong.