See also: 1904 in sports, other events of 1905, 1906 in sports and the Sports timeline.

Baseball

• World Series: the New York Giants defeated the Philadelphia Athletics four games to one.
• Debutes: Hal Chase (April 14), Ty Cobb (August 30), Eddie Cicotte (September 3)
• Final season: Jesse Burkett
• Trades:
  • January 16: The St. Louis Browns traded Jesse Burkett and Frank Huelsman to the Boston Americans for George Stone.

Football (Australian Rules)

• Victorian Football League
  • Fitzroy wins the 9th VFL Premiership (Fitzroy 4.6 (30) d Collingwood 2.5 (17))
  • See also Victorian Football League season 1905

Football (soccer)

• Alf Common becomes the first player ever to be transferred for £1000.

Football (American)

• The College football season is blighted by 15 fatal injuries, as a result of which US president Theodore Roosevelt calls upon the game's authorities to reform it.

Births

• July 22, Doc Cramer
• October 10, Wally Berger

Deaths

• September 10, Pete Browning