|Born||January 9, 1970|
He represented his native country at the 1992 Summer Olympics in Barcelona, Spain, where he won the bronze medal. In the semifinals he was stopped by Bulgaria's eventual runner-up Daniel Petrov. Quast also won the bronze medal at the 1989 European Amateur Boxing Championships in Athens, Greece.
- Defeated Mohamed Zbir (Morocco) 5-0
- Defeated Pramuansak Phosuwan (Thailand) 11-2
- Defeated Valentin Barbu (Romania) 15-7
- Lost to Daniel Petrov (Bulgaria) 9-15
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