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.

He allowed two runs in six innings in his only appearance in the 2007 Baseball World Cup.

[citation needed] He was on Panama's roster for the 2009 World Baseball Classic, but did not pitch in any games.

[1][2] This biographical article relating to a Panamanian baseball figure is a stub.