Óscar Pérez Rojas (born 1 February 1973) is a Mexican football goalkeeper who plays for Pachuca on loan from Cruz Azul and Mexico national team. His nickname "El Conejo" is Spanish for "The Rabbit". At 46 years old, he is currently the oldest active player in Liga MX. He has been capped 57 times for the Mexico national team since 1997. He played four games at the 2002 FIFA World Cup and 2010 FIFA World Cup. He also holds the Primera División records for career appearances and saves.
He was the starting goalkeeper for Cruz Azul since 1997 with the team winning the championship in the 1997 Winter Season. Pérez debuted for the team in 1993, facing Atlas which ended in a 0–0 draw. He quickly became the starting goalkeeper for Cruz Azul and won the 1997 Invierno Final, where Cruz Azul defeated Club León by a score of 2–1.
In a league game away to Estudiantes Tecos in 2006, Pérez scored by a header in stoppage time to equalise 1–1. In 2007, he was given an award for a record-making 400 appearances at Cruz Azul.