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.

[7] 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.

[9] 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.

[14] 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.

[19] On 21 January 2023, Morell scored his first goal for Portsmouth against Exeter City after 49 games and 13 league appearances in the 2022–23 season [20] Morrell qualifies to play for Wales through his Welsh mother Sian.