He has spent time on loan and dual registration at Hull Kingston Rovers in the Super League, at Featherstone Rovers, the Dewsbury Rams, the Bradford Bulls and the Batley Bulldogs in the RFL Championship, and at Newcastle Thunder in League 1.
[4] In 2018 he made professional début on loan at Featherstone Rovers and has also spent time at the Dewsbury Rams in the Championship.
[6] Mustapha made a total of 8 appearances for Hull KR in the 2021 Super League season including the club's 28-10 semi-final defeat against the Catalans Dragons.
[14] He played 13 matches for Castleford in the Super League XXVIII season as the club finished 11th on the table narrowly avoiding relegation.
[15] On 20 Jun 2024 it was reported that he had signed for Batley Bulldogs in the RFL Championship on DR loan[16] On 11 September 2019 Mustapha was called up for the Nigeria 60-man training squad.