Walter Richard Calderón Carcelén, nicknamed Mamita (born October 17, 1977) is a retired Ecuadorian football player.
Calderón began his professional career at Quito-based club ESPOLI. In 2000, he made the move to Deportivo Cuenca. At the club, he became a regular starter. He was a key player in the club's 2004 national champion squad. He soon left the squad in 2006 and moved to El Nacional in 2007 and Deportivo Quito in 2008. With Deportivo Quito, he won his second national title. In 2009, he made the move to LDU Quito. Despite having irregular starting times, he became a clutch striker, providing goals at decisive times. He won another national title with Liga in 2010, the 2009 Copa Sudamericana, and two Recopa Sudamericana (2009, 2010).
Walter Calderón at National-Football-Teams.com