Adolfo Abdiel Machado is a Panamanian football defender who currently plays for Major League Soccer side Houston Dynamo.

Club career
Around July 2008 Machado travelled to Colombia to play with Copa Mustang side Envigado along with U-23 teammate Armando Cooper. However the transfer failed and had to return to Panama to continue with Alianza. On December 2008 he was signed by Guatemalan side Deportivo Marquense. in May 2010 he joined Honduran side Marathon and in December 2010 Machado moved to Guatemalan top club Comunicaciones.

Doping case and suspension
in February 2012, Machado, alongside Comunicaciones teammates Fredy Thompson and Marvin Ceballos, was temporarily suspended from playing by FiFA after a positive test on the banned substance boldenone. A second test done at a laboratory in Canada reconfirmed the positive doping test and he was later suspended for two years, until 24 January 2014.

Before his ban ended, he signed with San Francisco in November 2013 ahead of the 2014 Clausura season but in December 2013, Machado was loaned to Costa Rican giants Saprissa for two seasons with an option to extend and debuted on the first day after his doping ban was lifted.

international career
Machado participated in thi 2008 CONCACAF Men's Pre-Olympic Tournament with Panama U-23 team been one of the most important players for Panama in the tournament.

He made his debut with the senior team on June 1, 2008 starting in the 1-0 victory over Guatemala. He has, as of 10 June 2015, earned a total of 45 caps, scoring 1 goal. He represented his country in 4 FiFA World Cup qualification matches and played at the 2009, 2011 and 2014 UNCAF Nations Cups as well as at the 2011 CONCACAF Gold Cup.