Dee ihe ga-aga n'ihu na paragraf a - A mara ọkwa Brennan dịka otu n'ime ndị ọhụrụ na-abanye na Nigel Carolan's Connacht academy tupu oge 2015/16 Ịga na ụlọ akwụkwọ Connacht mekwara ka ọ sonye na Galwegians na ọkwa okenye, ebe ọ na-egwu rugby ndị ntorobịa maka klọb ahụ. N'oge mbụ ya na ụlọ akwụkwọ agụmakwụkwọ, Brennan gosipụtara mgbe niile maka Galwegians na All-Ireland League ma kpọọkwa Connacht Eagles, mpaghara nke abụọ nke mpaghara ahụ. Ọ malitere ọzụzụ na ndị otu egwuregwu mbụ ma kpọọ aha ya na ndị okenye maka oge mbụ maka 2015 <unk> 16 Pro12
Egwuregwu megide Ulster na 1 Eprel 2016, ọ bụ ezie na ọ pụtaghị na bench. Brennan bụ otu n'ime ndị egwuregwu anọ nọ n'ụlọ akwụkwọ ndị na-azụ ọzụzụ na Connacht n'oge oge ahụ na-enwetaghị okpu maka ndị okenye. Mgbe ndị otu ahụ tozuru oke maka egwuregwu ikpeazụ nke Pro12, ndị fọdụrụ na ndị otu ahụ kwụrụ ụgwọ iji weta mmadụ anọ ahụ n'egwuregwu ahụ na Edinburgh iji mata onyinye ha.