Kammala jumla mai zuwa: Roy ya jagoranci Kitchener Rangers na Ontario Hockey League (OHL) tare da maki 87 a lokacin kakar 1999 <unk> 2000, kuma ya lashe gasar OHL Rookie of the Year. A kakar wasa ta gaba, ya zura kwallaye 42 da maki 81. Bayan haka ne Buffalo Sabres suka zaɓe shi a matsayin na 32 a cikin jerin 'yan wasa.
2001 NHL Entry Draft a ƙarshen kakar wasa. A kakar wasa ta gaba, 2001 <unk> 02 Roy ya kafa aikinsa na OHL na kwallaye 43 da maki 89 kuma ya ci gaba da kasancewa mai zira kwallaye na Rangers.