Kammala wannan jumla: A watan Mayu 2005, Ottawa 67 na OHL (OHL) ya tsara Couture ta 12th gaba ɗaya a cikin 2005 OHL Priority Draft. Ya ci gaba da zira kwallaye a kusa da maki-da-wasa a matsayin rookie tare da maki 64 a wasanni 65 a cikin 2005 <unk> 06, na uku a gasar rookie da ke zira kwallaye a bayan John Tavares da Sergei Kostitsyn. A kakar wasa ta gaba, a 2006<unk>07, an kara Couture zuwa jerin OHL don 2006 ADT Canada-Russia Challenge, wanda ya maye gurbin Jordan Staal, wanda NHL ta Pittsburgh Penguins ta riƙe. An kuma zaɓi Couture don yin wasa don taron Gabas a cikin OHL All-Star Game na 2007, yana cin nasarar gasar harbi. Bayan kammala kakar wasa ta biyu ta OHL, inda ya inganta zuwa maki 78 a wasanni 54, Couture ya kasance na tara a cikin San Jose Sharks a cikin
Zaɓin shiga NHL na 2007.