Abraham Atencio Castillo (born February 16, 1977) is a baseball pitcher who has played for the Panamanian National Baseball Team. He is perhaps most notable for being on Panama's roster for the 2009 World Baseball Classic.
In the 2005 Baseball World Cup, Atencio had a 2.20 ERA in 121⁄3 innings of work. He played in the 2006 Central American and Caribbean Games, allowing one earned run in 62⁄3 innings of work. In the 2006 COPABE qualifier for the 2008 Olympics, he allowed 14 baserunners in five innings of work. He allowed two runs in six innings in his only appearance in the 2007 Baseball World Cup. He earned the win in that game.
In the 2009 World Baseball Classic, Atencio was on Panama's roster, however he did not actually get the opportunity to pitch.