 On 20 May 2015 upon his return to Stevenage, he was one of 13 players to be released by the club at the end of the 2014–15 campaign.Following his release from Stevenage, Okenabirhie joined League One team Millwall on a trial basis in August 2015 and scored in his first game for the under-21 side against Ipswich Town.However, the trial was unsuccessful and he subsequently joined League Two side Barnet for another trial.