DOB: 22 March 1969
From: Collie/West Perth, Selection #60 1995 National Draft
Number: 38 1996-1997
After a successful rookie year the long kicking centreman and tagger could never find a permanent role in the side the next year and was delisted at the end of 1997. A knee injury which caused him to miss a month during the season hadn't helped him.
After nominating for the national draft but not being selected O'Brien returned to West Perth in 1998 and played his last season of senior football there.
He is the oldest player to make his VFL/AFL debut for Melbourne since World War II.
"Careers come to an end for Hawthorn premiership pair" - The Age 24/10/1997