Jock F. O'Brien is a former Australian rules football

Australian rules football

Australian rules football, officially known as Australian football, also called football, Aussie rules or footy is a sport played between two teams of 22 players on either...

er who played with North Melbourne

North Melbourne Football Club

The North Melbourne Football Club, nicknamed The Kangaroos, is the fourth oldest Australian rules football club in the Australian Football League and is one of the oldest sporting clubs in Australia and the world...

 in the Victorian Football League

Australian Football League

The Australian Football League is both the governing body and the major professional competition in the sport of Australian rules football...

 (VFL).

O'Brien, a centreman, made 16 appearances for North Melbourne in the 1959 VFL season

1959 VFL season

Results and statistics for the Victorian Football League season of 1959.-Premiership season:In 1959, the VFL competition consisted of twelve teams of 18 on-the-field players each, plus two substitute players, known as the 19th man and the 20th man...

 and played a further 10 games in 1960. He spent most of the 1961 season in the reserves and won the Gardiner Medal

Gardiner Medal

The Gardiner Medal was an Australian rules football award, formerly awarded to the best and fairest player in the VFL Reserves competition.Officially named the Seconds prior to 1959 and the Reserves from 1959 onwards, the competition ran from 1919 until 1999 and the medal was first awarded in...

.

He later played for Central District and took part in their inaugural South Australian National Football League

South Australian National Football League

The South Australian National Football League is an Australian rules football league based in the Australian state of South Australia. It is also the governing body for the sport of Australian rules football in South Australia....

season in 1964.