See also: 1902 in sports, other events of 1903, 1904 in sports and the list of 'years in sports'.

Cycling

• First Tour de France won by Maurice Garin

Football (Australian Rules)

• Victorian Football League
  • Collingwood wins the 7th VFL Premiership (Collingwood 4.7 (31) d Fitzroy 3.11 (29))
  • See also Victorian Football League season 1903

Baseball

• Frank Ferrell and Bill Devery purchase the defunct Baltimore franchise of the American league for $18,000 and move it to Manhattan.

• The Winnipeg Maroons win the Northern League Championship for the second consecutive year.

Events

• October - World Series: Boston Americans, representing the American League, defeat the National League champion Pittsburgh Pirates in eight games (best of nine) to win the first modern World Series.

Births

• September 6 – Maxie Rosenbloom, boxing champion and film actor (+ 1976)

Deaths