- Oct 3 British Open Men's Golf, St Andrews: Bob Martin wins his second Championship by 1 stroke from fellow Scot Archie Simpson
- Oct 17 Baseball sets all players salaries at $1,000-$2,000 for 1885 season
- Oct 22 John Ward & several teammates secretly form Brotherhood of Prof Base Ball Players, 1st baseball union
- Oct 24 "World Championship" Baseball Series, Cincinnati Base Ball Grounds: St. Louis Browns beat Chicago White Stockings, 13–4 in Game 7; disputed series tied at 3-3-1
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