|Competitor for the Dominican Republic|
|Silver||2008 Beijing||58 kg|
|Bronze||2011 Gyeongju||58 kg|
|Bronze||1999 Edmonton||54 kg|
|Pan American Games|
|Gold||2011 Guadalajara||58 kg|
|Gold||2007 Rio de Janeiro||58 kg|
|Bronze||2003 Santo Domingo||58 kg|
|Central American and Caribbean Games|
|Gold||2010 Mayaguez||58 kg|
|Gold||2002 San Salvador||54 kg|
He carried the flag for his delegation at the 2012 Summer Olympics in London. He was favored to win his county's third medal at these games. He competed in the Men's 58 kg (flyweight). He lasted one round and a half. A bad move shattered the meniscus and the anterior cruciate ligament in his right knee. He kept fighting with evident pain, before he limped away in tears.
- Sanguinetti, Pablo (8 August 2012). "Tears at taekwondo: the painful farewell of 2008 medallist Mercedes". Europe Online. Retrieved 8 August 2012.
|Flagbearer for Dominican Republic
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