Career
Medina started boxing under the guidance of coach Severino Aquino at the age of 10. He is a military athlete in the Dominican Air Force, with the rank of private. 2010
Medina competed at the 2010 Youth World Amateur Boxing Championships, being defeated by Indian boxer Devendro Laishram 17–8 in his first fight.
He represented Louisiana Romana at the 2010 Romana Cup, winning the gold medal in the 49 kg light flyweight category by defeating Luis Díaz of the Dominican Republic National Team.
2011
Medina boxed at Pan American Games Qualifier 1 in Cumaná, Venezuela, winning the gold medal and thus qualifying for the Pan American Games. At the games he lost to Joselito Velázquez in the semifinal to finish with the bronze medal in the light flyweight category
In July 2011, Medina boxed at the 5th CISM Military World Games and was defeated by Indian Nanao Singh 20–18 in the preliminary round of the 49 kg category.
In the 2011 World Amateur Boxing Championships he lost 17–6 to Zou Shiming in the first round. In March, Medina was runner-up to Dagoberto Agüero for the Dominican Republic Boxing Federation"s Boxer of the Year award.
Medina was disqualified in his last-16 fight against Velázquez in the American Olympic Qualification Tournament.
After being down 9–17 in the third round, Medina downed Velásquez with an illegal low punch, and the referee disqualified him.