|Representing West Germany|
|1988 Seoul||Team jumping|
|1984 Los Angeles||Team jumping|
|1996 Atlanta||Team jumping|
Sloothaak competed for West Germany at the 1984 Summer Olympics in Los Angeles, where he received a bronze medal in team jumping with Farmer, and at the 1988 Summer Olympics in Seoul, where the team received a gold medal.
Sloothaak still holds the world record for the indoor Puissance. In June 1991, Sloothaak jumped a record-breaking 2.40 m (7 ft 10 in) in Chaudfontaine, Belgium on the horse Optiebeurs Golo.
- "1996 Summer Olympics – Atlanta, United States – Equestrian" Archived 2008-09-05 at the Wayback Machine. databaseOlympics.com (Retrieved on September 5, 2008)
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