After failing to break into the first team squad and a period as a free agent, he transferred to Linfield in 2023, for whom he appeared sparingly before his release in early 2024.
A winger or midfielder, Haygarth entered the Manchester United academy at age 9 and progressed to sign a scholarship in 2018.
[6] He won his maiden call into the first team squad for a league match against Nottingham Forest on 12 December 2020 and made his debut as a substitute for Emiliano Marcondes late in the 3–1 win.
[7] He made two FA Cup appearances in January 2021, but was not involved in Brentford's successful 2021 playoff campaign,[8] which clinched promotion to the Premier League.
[10][11][12][13][14][15] His only senior call-up of the 2021–22 regular season came on 20 November 2021, when he remained an unused substitute during a 3–3 Premier League draw with Newcastle United.