| Fullname: | Humberto Junior Machacón Cabrera |
| Nationality: | Colombian |
| Birth Date: | 5 October 1989 |
| Birth Place: | Barranquilla |
| Height: | 198 cm |
| Spike: | 355 cm |
| Block: | 335 cm |
| Position: | Outside hitter/spiker |
| Years1: | 2010–11 |
| Club1: |  CV Teruel |
| Years2: | 2012–13 |
| Club2: | Foinikas Syros |
| Years3: | 2013–14 |
| Club3: |  Sivas Belediye Spor |
| Years4: | 2014–15 |
| Club4: |  Effektor Kielce |
| Years5: | 2015–16 |
| Club5: | Cajasol Juvasa Voley |
| Years6: | 2016–17 |
| Club6: |  Plessis-Robinson Volley-ball |
| Years7: | 2018– |
| Club7: | TSV Herrsching |
| Nationalyears: | 2008– |
| Nationalteam: | Colombia |
Humberto Junior Machacón Cabrera (born October 5, 1989) in Barranquilla is a professional volleyball player from Colombia.
He plays as an outside hitter in the Colombian national team and for TSV Herrsching in the German Volleyball Bundesliga.
Machacón started his professional career in the Liga Vallecaucana de Voleibol in Cali, Colombia. At the age of 21 he was signed by CV Teruel[1] in the Spanish Superliga. With Teruel he won both the league and the cup.[2] He subsequently played for other European clubs in Greece's first league,[3] the Polish PlusLiga[4] and in Turkey.[5] In 2018 he was signed by TSV Herrsching.[6]
Machacón has been part of the Colombian national team since his youth. He participated and placed on the podium in several occasions, like the South American Games 2010, in the Bolivarian Games 2013, in the Southamerican Championship 2014 and in the Central American Games 2018.