Morrell began his career with
Bristol City whilst attending The Castle School in Thornbury, and signed a professional contract with the club in December 2012 after turning down an offer from
Liverpool. He made his debut on 8 October 2013 in a 2–1
Football League Trophy defeat against
Wycombe Wanderers. In August 2016 it was announced that Morrell would join
National League club
Sutton United, initially on a one-month loan. He made his first appearance for the U's as a substitute coming on at 61' in a 3–1 victory over
Lincoln City at
Sincil Bank on 13 August 2016, Sutton's first win in English football's fifth tier in 16 years. One reporter described Morrell as having "had a great competitive debut overall". He made two further substitute appearances in home victories against
Torquay United and
Macclesfield Town before returning to his parent club in early September 2016. On 24 February 2017, Morrell joined
Margate on loan for a month. He made his debut as a 58th minute substitute during a 2–0 home loss to
Whitehawk. On 30 August 2017, Morrell signed for
Cheltenham Town on loan until January 2018. His first goal for the club came in a 3–0 win against
Mansfield Town and scored three times in total for the club. On 27 June 2019, Morrell signed for
Lincoln City on a season-long loan until May 2020. He scored his first goal in a dominant 5–1 win against
Bolton Wanderers on 14 January 2020, however it was later given as an own-goal for
Josh Emmanuel. In November 2019 he signed a new contract with Bristol City. On 7 March 2020, Morrell played his final game for the Imps against
Burton Albion, due to the season being cancelled early because of
COVID-19. In June 2020, Morrell was named Lincoln City's Player of the Season.
Luton Town On 15 October 2020 Morrell joined Luton Town for an undisclosed fee.
Portsmouth On 9 August 2021, Morrell joined
EFL League One Portsmouth for an undisclosed fee on a 3-year contract with a 12-month extension clause. On 21 January 2023, Morrell scored his first goal for Portsmouth against Exeter City after 49 games and 13 league appearances in the 2022–23 season Morrell suffered a knee injury in January 2024 and he was released by Portsmouth at the end of the 2023-24 season. ==International career==