In January 2011, Trecco signed for Primera División club Unión San Felipe and after a successful season with the club of Aconcagua, he joined to Cobreloa in June, being runner-up of the Clausura Tournament with Nelson Acosta.
Néstor Kirchner | Daniel Nestor | Nestor Makhno | Nestor | Nestor (Stoic) | Palace of Nestor | Nestor's Palace | Nestor Serrano | Néstor Rodríguez Lobaina | Nestor (mythology) | Néstor Morales | Nestor Lakoba | Nestor J. Zaluzec | Néstor Gorosito | Nestor Carbonell | Nestor Buinitsky | Nestor 'Batko' Makhno | Néstor Almendros |