Medals: 1 Gold (1 Total)
Oscar Olson represented the Milwaukee AC on the winning tug-of-war team in 1904. Like all the members of that team, he was actually from Chicago. There was a team event in the 1904 Olympic athletics (track & field) competition, with the Milwaukee AC a contender for the team title. The club convinced several Chicago athletes, including Olson, to compete for them in tug-of-war, which was considered an event in track & field in that era. Olson also placed fourth in the two-handed weightlifting event at the 1904 Olympics.
|1904 Summer||St. Louis||Tug-Of-War||Men's Tug-Of-War||Milwaukee Athletic Club-1||USA||1||Gold|
|1904 Summer||St. Louis||Weightlifting||Men's Unlimited, Two Hands||United States||USA||4|
|1904 Summer||St. Louis||Tug-Of-War||Milwaukee Athletic Club-1||USA||Round One||Match #1||1||1904-08-31||Seiling (USA) , Olson (USA) , Magnusson (USA) , Johnson (USA) , Flanagan (USA) , Walker (RSA) , Visser (RSA) , Schutte (RSA) , Lombard (RSA) , Hillense (RSA)|
|1904 Summer||St. Louis||Tug-Of-War||Milwaukee Athletic Club-1||USA||Semi-Finals||Match #1||1||1904-08-31||Seiling (USA) , Olson (USA) , Magnusson (USA) , Johnson (USA) , Flanagan (USA) , Upshaw (USA) , Seiling (USA) , Rose (USA) , Rodenberg (USA) , Braun (USA)|
|1904 Summer||St. Louis||Tug-Of-War||Milwaukee Athletic Club-1||USA||Final Round||Match #1||1||1904-09-01||Seiling (USA) , Olson (USA) , Magnusson (USA) , Johnson (USA) , Flanagan (USA) , Mitchel (USA) , Jones (USA) , Feuerbach (USA) , Dieges (USA) , Chadwick (USA)|
|1904 Summer||St. Louis||Weightlifting||United States||USA||Final Standings||4||67.81|