Rubuta ci gaba don wannan sakin layi - Wani dan wasa mai kyauta, Giroux an gayyace shi zuwa sansanin horo na Gatineau Olympiques don yin gwaji. Ba da daɗewa ba aka sa hannu. A lokacin da ya fara wasa tare da Olympiques, Giroux ya zira kwallaye 39 don jimlar maki 103 a wasanni 69 kuma an kira shi Quebec Major Junior Hockey League (QMJHL) Rookie na Shekara. Ya shiga cikin 2006 NHL Entry Draft
kuma Philadelphia Flyers ne suka zaɓe shi a matsayin na 22 a duka. Flyers sun sanya hannu Giroux zuwa kwangilar shiga a ranar 23 ga Yuli, 2007.