Liam Brady, head of youth development at Premier League club Arsenal, offered him a trial which proved successful, and the player joined Arsenal as a scholar in September 2002. In the 2002–03 season he scored 17 goals in 20 games for the under-17 side, including six in a 7–1 victory over Wolverhampton Wanderers U17. Handed his first professional contract on his 18th birthdaya move which led to Arsenal being fined £10,000 and given a suspended two-year transfer ban for inadvertently dealing with an unlicensed agentQuincy signed a new long-term contract in July 2005.