He attended St Patrick's College in Ballarat.
In 2011, he captained the St Patrick's schoolboy side to a victory in the MCC Herald Sun Shield[1] He was recruited by Essendon with the 59th overall pick in the 2011 national draft.
He made his debut in round 22, 2012, against Richmond at the Melbourne Cricket Ground.
[3] In 2016, O'Brien joined Woodville-West Torrens Eagles in the SANFL.
This Australian rules football biography of a person born in the 1990s is a stub.