The Thrilla in Manila
Oct 1 "The Thrilla in Manila"; Muhammad Ali stops Joe Frazier in 14 rounds in Quezon City, the Philippines to retain his WBC/WBA heavyweight title
F1 World Champion
Oct 5 Austrian Niki Lauda wins the United States Grand Prix at Watkins Glen to claim his first Formula 1 World Drivers Championship; wins by 19.5 points from Emerson Fittipaldi of Brazil
- Oct 7 MLB American League Championship: Boston Red Sox beat Oakland Athletics, 3 games to 0
- Oct 7 MLB National League Championship: Cincinnati Reds beat Pittsburgh Pirates, 3 games to 0
- Oct 7 Players' Association files a suit on behalf of Dodgers' Andy Messersmith
- Oct 8 San Antonio Spurs, then members of the ABA, defeat the NBA's Atlanta Hawks, 109-107 in the first basketball game ever played in the Louisiana Superdome
NHL Record
Oct 11 Islander's Bryan Trottier's 1st career hat trick
World Series
Oct 22 Baseball World Series: Cincinnati Reds beat Boston Red Sox, 4-3 at Fenway Park for 4 games to 3 series win; MVP: Reds switch hitter Pete Rose
- Oct 25 Denver Nuggets 1st game at McNichols Sports Arena beat St Louis Spirits
- Oct 26 Cuba beats Mexico for its 4th Pan Am Games Gold Medal in baseball
- Oct 28 Calvin Murphy (Houston) begins NBA free throw streak of 58 games
- Oct 30 Giants pitcher John "the Count of" Montefusco wins NL Rookie of Year
- Oct 30 John Bucyk, Boston, became 7th NHLer to score 500 goals