Rubuta ci gaba don wannan sakin layi - Cooney ya fara buga wasan farko a Leinster a ranar 2 ga Satumba, 2011, lokacin da ya fara wasa da Ospreys a Swansea yayin wasan farko na 2011<unk>12 Pro12
Ka yi haƙuri. Cooney ya ci gaba da yin wasanni don Leinster a gasar, yana wasa sau hudu, kodayake kowane ɗayan waɗannan bayyanar ya fito daga benci. Yawancin bayyanar Cooney sun zo ne yayin da 'yan wasan gaba na Leinster ba su halarci gasar cin kofin duniya ta 2011, kodayake ya kuma zira kwallaye na farko a kungiyar a baya a kakar wasa ta Benetton Treviso. Cooney ya fara bugawa kungiyar Turai wasa a wasan karshe na gasar cin kofin Heineken ta 2011-12, inda ya shigo a matsayin mai maye gurbin Leinster a wasan da suka yi nasara a kan abokan hamayyarsu na Irish Ulster a 42-14 kuma ya lashe lambar yabo a cikin aikin.