- Dec 1 49th Iron Bowl: Alabama beats Auburn 17-15 in Birmingham
Doug Flutie
Dec 1 50th Heisman Trophy Award: Doug Flutie, Boston College (QB)
- Dec 1 American boxer Greg Page KOs home town favourite Gerrie Coetzee in 8th round to win WBA heavyweight title in Sun City, South Africa
Chris Evert's 1,000th
Dec 1 American tennis icon Chris Evert wins her 1,000th career professional match; beats Pascale Paradis of France 6-1, 6-7, 6-2 in the round of 16 at the Australian Open; Evert goes on to win the event
- Dec 2 Australian Test cricket spin bowler Bob Holland takes a career best 9-83 for NSW in the Sheffield Shield match against South Australia in Sydney
Dan Marino
Dec 2 Miami quarterback Dan Marino breaks NFL single-season touchdown pass record when he throws his 37th in the Dolphins' 45-34 loss to the Raiders; finishes season with 48 TD passes
- Dec 5 New York Yankees trade catcher Rick Cerone to Atlanta Braves for pitcher Brian Fisher
Rickey Henderson to the Yankees
Dec 5 Oakland Athletics trade Rickey Henderson to the NY Yankees for Jay Howell and Jose Rijo
Suková Breaks Navratilova Streak
Dec 6 Helena Suková snaps Martina Navratilova's 74-match winning streak 1-6, 6-3, 7-5 in the semi finals of the Australian Open in Melbourne; ends Navratilova's hopes of completing the Grand Slam
Border Captains Australia
Dec 7 Allan Border's 1st Test Cricket match as captain (v WI Adelaide)
- Dec 8 Australian Open Women's Tennis: Chris Evert-Lloyd beats Helena Suková 6-7, 6-1, 6-3; continues streak of winning at least 1 major per year since 1973
Wilander 2nd Straight Win
Dec 9 Australian Open Men's Tennis: Sweden's Mats Wilander wins 2nd straight Australian title; beats Kevin Curren of South Africa 6-7, 6-4, 7-6, 6-2
Dickerson Rush Record
Dec 9 LA Ram Eric Dickerson rushes 215 yards for season record 2,105 yards
Thomson Wins Seniors
Dec 9 Senior PGA Championship, PGA National GC: Australian Peter Thomson wins his lone Champions Tour major title by 3 strokes from Don January
- Dec 18 73rd Davis Cup: Sweden beats USA in Gothenburg (4-1)
Bowman's Record NHL Win
Dec 19 Scotty Bowman wins his 691st regular season game, the most wins by any coach in NHL history
Gretzky Youngest to Score 1,000
Dec 19 Wayne Gretzky, 23, is 18th & youngest NHL-er to score 1,000 points
Richards Bats 208
Dec 23 West Indies batsman Viv Richards scores 208 vs Ausatralia in test match at the Melbourne Cricket Ground
Michel Platini's Second in a Row
Dec 25 Ballon d'Or: Juventus' French midfielder Michel Platini is named Europe's best football player for the 2nd consecutive time; beats Bordeaux midfielder Jean Tigana and Verona striker Preben Elkjær
- Dec 25 Knicks basketball forward Bernard King scores 60 points, but New York loses, 120-114 to the New Jersey Nets on Xmas Day at Madison Square Garden
- Dec 27 Padres' free agent pitcher Ed Whitson signs with NY Yankees
- Dec 29 NHL St. Louis Blues launch 27 shots in 1 period during 5-1 loss to visiting New York Islanders; NY goaltender Kelly Hrudey finishes game with 47 saves
- Dec 29 Wayne Gretzky scores his NHL career 32nd hat trick & adds 3 assists in Edmonton's 6-3 win over Detroit Red Wings for his 100th point in just 35 games; 2nd fastest in history - recorded 100 points in 34 games in 1983
- Dec 31 Test Cricket debut of Mohammad Azharuddin, v England at Calcutta