Patrick Joseph "Paddy" O'Brien (16 April 1893 – 25 March 1964) was an 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 Carlton

Carlton Football Club

The Carlton Football Club is a professional Australian rules football club based in Melbourne, Victoria. The club competes in the Australian Football League, and was one of the eight founding members of that competition in 1897...

 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 was a physically tough defender who usually played at centre half back. He was Carlton's captain in 1924, and was a member of Carlton's back to back premierships in 1914 and 1915.

In 1925 he joined Footscray for their inaugural VFL season but played just 15 games for the club.