Juan Núñez (athlete) explained

Juan Núñez Lima (born September 19, 1959) is a retired Dominican athlete who competed in the sprints. He competed at the World Championships in Helsinki in 1983 in the 100 meters where he reached the final and finished 5th.

Anti-doping rule violation

At the 1983 Pan American Games Núñez was disqualified after testing positive for the stimulant Fencamfamine.^{[1] [2]}

International competitions

1981	Central American and Caribbean Championships	Santo Domingo, DR	3rd	100 metres
			1st	200 metres
1982	Central American and Caribbean Games	Havana, Cuba	3rd	100 metres
			3rd	200 metres
1983	Central American and Caribbean Championships	Havana, Cuba	1st	100 metres
			1st	200 metres
	Pan American Games	Caracas, Venezuela	DSQ (2nd)	100 metres
1986	Central American and Caribbean Games	Santiago de los Caballeros, DR	2nd	100 metres
			2nd	200 metres
1987	Central American and Caribbean Championships	Caracas, Venezuela	1st	100 metres
			2nd	200 metres
	Pan American Games	Indianapolis, United States	3rd	100 metres

Notes and References

1. https://news.google.com/newspapers?nid=1807&dat=19830830&id=eushAAAAIBAJ&sjid=1HEEAAAAIBAJ&pg=3287,234854 Games spoiled by controversy
2. Brigitte Berendonk: Doping-Dokumente. Von der Forschung zum Betrug. Springer-Verlag, Berlin 1991,