On 9 August 2016, Adeniran made his professional debut in a League Cup match against Leyton Orient scoring with a first half header sending Fulham on their way to a 3–2 win.[4] He made his league debut for Fulham as a late substitute against Nottingham Forest on 27 September 2016.[5]
Everton
On 31 August 2017, Adeniran made a transfer deadline day switch to Everton.[6] It was announced that his contract wouldn't be extended at the end of the 2020-21 season.[7]
On 10 July 2021, he joined recently relegated EFL League One side Sheffield Wednesday.[9] He made his competitive debut on 1 August 2021, at home to Huddersfield Town, in a game which saw them lose 4-2 on penalties, with Adeniran scoring his.[10] He scored his first Owls goal against Doncaster Rovers on 14 August 2021.[11] He was awarded the fans player of the month for September 2021, after he featured in three of the four games and scored his second goal of the campaign in the 1-1 draw v Ipswich Town.[12] On 29 January 2022, Adeniran ruled himself out for the rest of the season after an operation, which was confirmed by manager Darren Moore.[13] The following season, he would win EFL Cup goal of the round for both the first and second round.[14] Following promotion back to the EFL Championship it was confirmed that Adeniran would be released following the end of his contract.[15]
On 31 January 2024, Adeniran joined Israeli Premier League club Hapoel Petah Tikva on a short-term contract until the end of the season, with the option for a further two years.[17]
St Mirren
He made a return to British football by signing for St Mirren on a one-year deal with year option.[18] He accredited his move to his friendship with Toyosi Olusanya and Jaden Brown.