 Constantine had been linked with a number of League One clubs throughout pre-season, however he agreed a contract in principle with Leeds United when they were in administration, paying out of his own pocket to take part in the pre-season programme.Leeds later completed the signing of Constantine on a two-year contract on 7 August 2007.Constantine started his first game for Leeds in the 2–1 defeat to Bury in the Football League Trophy where he scored in the 8th minute.