Career
Vallecillo started his career at Real España with whom he spent the majority of his career. He moved abroad to play the 2011 Clausura in Guatemala with Municipal. In summer 2011 he returned home and joined Atlético Choloma but he was released by the club after the 2011 Apertura.
In 2012 he played in the Copa Latina for Blue Stars Honduras.
In 2013 he joined compatriot Saúl Martínez at newly formed Miami United of the National Premier Soccer League. Vallecillo played at the 1999 Fédération internationale de football association World Youth Championship in Nigeria and made his senior debut for Honduras in an April 2003 CONCACAF Gold Cup qualification match against Trinidad & Tobago and has earned a total of 34 caps, scoring no goals.
His final international was an August 2007 friendly match against El Salvador.