 In 2002, Pérez experienced a decline in his statistics and playing time, but nonetheless helped the Crew win their first trophy, the Lamar Hunt U.S. Open Cup.Pérez also represented the Colombian national team and was a participant at the 1992 Summer Olympics, 1997 Copa America, and 1998 FIFA World Cup.He played in all four of Colombia's matches at the Copa America in 1997, but remained on the bench throughout the World Cup the following year.