Alberto Pedro Spencer Herrera (December 6, 1937 – November 3, 2006) was an Ecuadorian football (soccer) player, regarded as the best of his country. He is probably best known for his still-standing record for scoring the most goals in the Copa Libertadores, the most important club tournament in South America. He was elected the 20th best South American footballer of the 20th century in a poll by the IFFHS in 2004. He was known as "Cabeza Mágica" (Spanish for magic head).

Born in Ancón, Guayas, Ecuador, Spencer was the son of a Jamaican of British origin.

He was an ambidextrous striker with lethal pace, off-the-ball movement, heading and balance skills, and excellent finishing, that tore defences to shreds for over a decade. After his retirement in 1973, he lived in Montevideo, Uruguay. In 1982, he was appointed consul of Ecuador in Uruguay.

Spencer suffered a heart attack on September 14, 2006 during a routine checkup with his cardiologist. He died on November 3, 2006 in the Cleveland Clinic in Cleveland, Ohio, United States. His line survives through his Chilean wife María Teresa, his children Alberto, Walter, Jacqueline and his grandchildren.