[2] Oluseye started his playing career as a striker at Shooting Stars S.C. before transferring to Al-Seeb Club of Oman, where he reportedly became the top scorer in the 1999–2000 Omani League and helped his team finish in third place.
[3][4][5] He attended trials held by newly established DPMM FC of Brunei in early 2001 and signed full terms the following year, just in time for the inaugural 2002 Proton B-League.
[6][7] He scored seven goals before succumbing to an injury suffered at a friendly tournament between rounds, forcing a premature end to his season.
[9] He first scored four goals against IBM Bukok in an 11-0 routing of the Temburong District side on 30 May,[10] followed by a first-half hattrick against Jerudong FC on 4 July.
[21] A hat-trick in his debut brought hope to a languishing Brunei side fighting to keep attendances,[22] but eventually the team suffered poor form and lost their final four games and finished in mid-table.