DOB: 16 April 1961
Debut: Round 20, 1980 against Richmond at MCG
Last MFC Game: Round 2, 1983 against Richmond at MCG
From: St. Peters East Bentleigh
Number: 50 1980, 40 1981-1983
Under 19's Best and Fairest - 1980
Reserves Premiership player - 1984
Games: 22 (25 total)
Goals: 0 (2 total)
Forced to undergo a total reconstruction on his his right knee after injuring it in Round 2, 1983 O'Brien returned with the Reserves late in 1984 and remained on the senior list through 1985 without playing another senior game.
After a handful of reserves games during 1986 he joined North Melbourne but didn't play a match. It took until 1988 for him to restart his VFL career with Essendon where he played three matches.
His brother Dallas won the 1983 Stawell Gift and Paul was Melbourne's representative in the 1982 Grand Final Sprint.
Probably the Paul O'Brien who played for Prahran in 1986.
Grand Final Sprint
"Sitting out the season" - The Age 23/06/1983
Football Record R4 1986
Essendon FC profile (dead link)