His personal best time was 44.86 seconds, achieved at the 1989 World Cup in Barcelona. This places him seventh on the German all-time list, behind Thomas Schönlebe, Erwin Skamrahl, Ingo Schultz, Karl Honz, Hartmut Weber and Mathias Schersing.
Carlowitz represented the sports club SC Karl-Marx-Stadt.
|Representing East Germany|
|1981||European Junior Championships||Utrecht, Netherlands||2nd||400 m||47.40|
|1983||European Junior Championships||Schwechat, Austria||2nd||400 m||45.72|
|1984||Friendship Games||Moscow, Soviet Union||2nd||4 × 400 m relay||3:00.47|
|1988||European Indoor Championships||Budapest, Hungary||1st||400 m||45.63|
|Olympic Games||Seoul, South Korea||4th||4 × 400 m relay||3:01.13|
|1989||World Cup||Barcelona, Spain||5th||4 × 400 m relay||3:02.72|
|1990||European Indoor Championships||Glasgow, Scotland||2nd||400 m||46.09|
|European Championships||Split, Yugoslavia||3rd||400m||45.27|
|3rd||4 × 400 m relay||3:01.51|
|1991||World Indoor Championships||Seville, Spain||1st||4 × 400 m relay||3:03.05|
|World Championships||Tokyo, Japan||6th||4 × 400 m relay||3:00.75|
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