Luguelín Santos participant in 2012 Ibero-American Championships in Athletics
First senior medals
At the start of 2011 he moved to San Germán, Puerto Rico to be close to his coach and study at the Interamerican University of Puerto Rico. A hamstring injury hampered his training in the first half of the year and also led to him pulling up in the final at the 2011 Central American and Caribbean Championships. He missed qualification for the 2011 World Championships in Athletics, but his form returned in August as he ran under 46 seconds in Bogotá. He excelled at the 2011 Pan American Games, where a series of good runs culminated in two silver medals and two Dominican records. He ran 44.71 seconds (beating Felix Sánchez's time) to take the 400 m silver medal behind Nery Brenes, then helped the Dominican 4 × 400 m relay quartet to a second national record of 3:00.44 minutes to finish as runners-up behind Cuba.Building upon his success in regional competition, he ran for the first time indoors at the 2012 IAAF World Indoor Championships, reaching the semi-finals and setting an indoor best of 46.83 seconds. He made a strong start on major track circuit, finishing second at the Doha Diamond League meeting with a time of 44.88 seconds. He was second at the Golden Spike Ostrava, then had a winning run of 44.45 seconds at the FBK Games, which ranked him third on the all-time junior lists. He also ran a national junior record of 20.73 seconds for the 200 metres that month. His first Diamond League win followed at the Adidas Grand Prix, where he beat former World and Olympic champion Jeremy Wariner. A day later he ran at the 2012 Ibero-American Championships in Athletics in Barquisimeto with the Dominican relay team, taking a bronze medal and securing their place at the Olympics.
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