- Jan 4 Stanley Cup, Aberdeen Pavilion, Ottawa, Ontario: Ottawa HC beats Winnipeg Rowing Club, 2-0 for 2-1 challenge series victory
- Jan 28 1st college sports letters given to Seniors who played on University of Chicago's football team are awarded blankets with letter "C" on them
- Feb 25 Stanley Cup: Ottawa Silver 7 sweep Toronto Marlboroughs in 2 games
- Feb 28 Football club Sport Lisboa (Benfica) founded in Lisbon, Portugal
- Mar 2 Stanley Cup, Montreal Arena, Westmount, Quebec: Montreal Wanderers and Ottawa HC tie, 5-5; Montreal disqualified for refusing to play second game in Ottawa
- Mar 3 England cricket all-rounder Bernard Bosanquet takes 6 for 51 as tourists dismiss Australia for 171 in the 4th Test in Sydney to regain the Ashes; take an unassailable, 3-1 series lead
- Mar 8 Australian cricket spin bowler Hugh Trumble dismisses England batsmen Bernard Bosanquet, Plum Warner and Dick Lilley for his second Test hat-trick in 5th Test victory in Melbourne; Trumble's final Test
- Mar 9 Brandon's Lester Patrick becomes 1st hockey defenseman to score a goal
- Mar 11 Stanley Cup: Ottawa Silver 7 sweep Brandon Wheat Kings in 2 games
- Mar 25 66th Grand National: Arthur Birch wins aboard 25/1 New Zealand bred Moifaa; horse survives shipwreck off Ireland a year earlier
- Apr 5 The first international rugby league match is played between England and an Other Nationalities team (Welsh & Scottish players) in Central Park, Wigan, England.
Chesbro's 1st Win
Apr 14 NY Highlanders' future Baseball HOF pitcher Jack Chesbro's first of 41 wins this season; pitches complete game and beats Boston Americans, 8-2 at Hilltop Park, NYC
- Apr 18 8th Boston Marathon won by Michael Spring in 2:38:04.4
- May 2 30th Kentucky Derby: Shorty Prior riding Elwood wins in 2:08.50
- May 21 Federation Internationale de Football Association (FIFA) forms in Paris
- May 25 38th Belmont: George Odom aboard Delhi wins in 2:06.6
- May 27 NY Giants first baseman Dan McGann collects MLB record 5 stolen bases in 3-1 win over the Brooklyn Superbas at the Polo Grounds in NYC; record broken in 1991 by Otis Nixon
- May 28 29th Preakness: Eugene Hildebrand aboard Bryn Mawr wins in 1:44.2
44th British Men's Open
Jun 10 British Open Men's Golf, Royal St George's GC: Jack White wins his only major title, 1 stroke ahead of runners-up James Braid and J.H. Taylor, both former champions
- Jun 11 Chicago Cubs pitcher Bob Wicker no-hits NY Giants, wins in 12th on 1 hitter, 1-0
- Jun 21 Boston Herald tells of Red Sox trade "Dougherty as a Yankee," 1st known reference to NY club as Yankees (became Yankees in 1913)
- Jun 25 US National Championship Women's Tennis, Philadelphia CC: May Sutton beats defending champion Elisabeth Moore 6-1, 6-2 for her first of 3 major titles
Three-Time Wimbledon Champion
Jun 27 Wimbledon Men's Tennis: Laurence Doherty wins 3rd consecutive Wimbledon singles crown; beats Frank Riseley for 2nd straight year 6-1, 7-5, 8-6
Chambers Defends Wimbledon Title
Jun 28 Wimbledon Women's Tennis: Reigning champion Dorothea Chambers beats Charlotte Cooper 6-0, 6-3
1st US Olympic Games
Jul 1 III Summer (Modern) Olympic Games open in St Louis, the first held in the United States
- Jul 1 Willie Anderson becomes the first 2-time Western Open golf champion, beating fellow Scot Alex Smith by 4 strokes at Michigan's Kent CC
- Jul 4 International Lawn Tennis Challenge, Wimbledon: Laurence Doherty & Reggie Doherty beat Paul de Borman & William le Maire de Warzée 6-0, 6-1, 6-3 to give British Isles an unassailable 3-0 lead over Belgium (ends 5-0)
- Jul 5 NY Giants 18-game winning streak ends as Phillies win 6-5 in 10 innings at Huntington Park
- Jul 9 US Open Men's Golf, Glen View GC: defending champion Willie Anderson of Scotland wins the 3rd of his 4 Open titles, 5 strokes ahead of runner-up Gilbert Nicholls
- Jul 24 2nd Tour de France won by Henri Cornet of France
- Aug 10 NY Highlanders pitcher Jack Chesbro ends string of 30 consecutive complete games in a 5-1 loss to Chicago White Sox at South Side Park, Chicago
- Aug 17 Boston's Jesse Tannehell no-hits Chicago White Sox, 6-0
Jeffries TKOs Munroe
Aug 25 Champion James J. Jeffries scores a 2nd round TKO win over Jack Munroe in San Francisco; Jeffries retires after his 7th heavyweight boxing title defense
- Aug 30 American runner Thomas Hicks wins marathon gold medal in a time of 3:28:53 over a 40k course at the St. Louis Olympics
- Aug 31 US National Championship Men's Tennis, Newport, RI: Holcombe Ward beats William Clothier 10-8, 6-4, 9-7 for his lone major singles title
- Sep 3 For the only time in Olympic Games history, there is a throw-off in the discus final after Americans Martin Sheridan & Ralph Rose tie with a best throw of 128' 10½" in St. Louis; Sheridan wins with 127' 10¼"
- Sep 6 Soccer team Rheden forms
- Sep 9 Boston Herald again refers to NY baseball club as Yankees, when it reports "Yankees take 2," Yankee name not official till 1913
- Sep 30 White Sox lefty Doc White, pitches his 5th shutout in 18 days
- Oct 2 White Sox left-hander Doc White's streak of 45 consecutive MLB scoreless innings is snapped by the New York Highlanders in Chicago; White Sox win, 7-1 at South Side Park III
- Oct 3 New York Giants pitcher Christy Mathewson strikes out 16 Cardinals in a 3-1 Giants victory over St. Louis; new MLB record; finishes the game in 1 hour, 15 minutes
- Oct 7 NY Highlanders beat Boston Americans, 3-2 at Hilltop Park, NYC for pitcher Jack Chesbro's MLB record 41st win of the season (41-12)
- Oct 8 Vanderbilt Cup, first major trophy in American auto racing is conducted on public roads in Nassau County area of Long Island, NY; inaugural winner, American driver George Heath in a Panhard
- Oct 10 Boston pitchers achieve 148 complete games-an AL record, also record for total complete games AL 1,098, NL 1,089
- Nov 12 9th Iron Bowl: Auburn beats Alabama 29-5 in Birmingham
- Nov 23 III Summer (Modern) Olympic Games close in St Louis
- Dec 19 Dawson City hockey team begins 9 day walk to get a boat to Seattle to catch a train to Ottawa to play in Stanley Cup on Jan 13 1905
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