Events in Sport
- Dec 1 National League President John Heydler first to propose a baseball rule change calling for a 10th man, or 'designated hitter', to bat in place of the pitcher; ironically, the NL vote in favour of proposal, but the American League turn it down
- Dec 1 CFL Grey Cup, AAA Grounds, Hamilton: Hamilton Tigers win 3rd Cup with 30-0 shutout of Regina Roughriders
Event of Interest
Dec 26 Johnny Weissmuller announces his retirement from amateur swimming

Johnny Weissmuller
Birthdays in Sport
- Dec 3 Jack McMahon, American basketball guard and coach (player Rochester Royal, St. Louis Hawks; coach Cincinnati Royals, San Diego Rockets, Pittsburgh Condors), born in Brooklyn, New York (d. 1989)
- Dec 9 André Milhoux, Belgian racing driver, born in Bressoux, Belgium (d. 1956)
- Dec 20 Jack Christiansen, American football player and coach (Lions), born in Sublette, Kansas
- Dec 31 Hugh McElhenny, American NFL halfback (SF, Minnesota, Giants, Detroit), born in Los Angeles, California