Luguelín was presented onto the scene in the 2011 Pan-American games in Mexico, where surprised the world by running with the best score of 44.71 to the age of 18. In 2012, Santos was the World Junior 400m champion and Olympic Silver Medalist.
| Hengelo (400 metros) | 27/05/2012 | 45.45 |
| Uppsala (300 metros) | 28/07/2012 | 32.56 |
| Mayagüez (200 metros) | 05/05/2012 | 20.73 |
Moscow Results 2013
 |
POS | BIB | ATHLET | COUNTRY | SCORE | REACTION TIME | |
|---|---|---|---|---|---|---|---|
 |
1 | 1150 | LaShawn MERRITT |  EE.UU. |
43.74 | WL | 0.256 |
|
2 | 1148 | , Tony MCQUAY | EE.UU. |
44.40 | PB | 0.155 |
|
3 | 349 | Luguelín SANTOS |  DOM |
44.52 | SB | 0.350 |
|
4 | 176 | Jonathan BORLEE |  BEL |
44.54 | SB | 0.224 |
|
5 | 330 | Pavel MASLAK |  CZE |
44.91 | 0.169 | |
|
6 | 744 | Yousef Ahmed MASRAHI |  KSA |
44.97 | 0.162 | |
|
7 | 560 | Kirani JAMES |  GRN |
44.99 | 0.186 | |
|
8 | 210 | Anderson HENRIQUES |  BRA |
45.03 | 0.157 |
