He then moved to West Ham United in the Premier League aged 21 before transferring to Teesside a year later, briefly spending time on loan at Sunderland in early 2018.
Fletcher enjoyed his most prolific season in 2019/20, scoring 11 goals and creating seven assists in the Championship, before injury restricted the striker’s appearances last campaign. His long-range strike against West Bromwich Albion in December 2019 was voted Middlesbrough's 'Goal of the Decade'.
Born in Keighley, West Yorkshire, the towering yet agile forward was also capped three times by England Under-20s, scoring two goals.
Welcome to Watford, Ashley!