Born in New York to a Puerto Rican mother, Logroño moved to San Juan, Puerto Rico along with his family when he was nine years old. He was soon recognized as a multifaceted entertainer by his schoolteachers and classmates. His nickname "Sunshine" came from a short stint (1973) as a disc jockey for San Juan-based WBMJ-AM, Puerto Rico's first rock and roll station (another WBMJ disc jockey at the time, Raymond Broussard, better known as "Moonshadow", later became the co-host of El Vacilón de la Mañana, a very popular Spanish language morning radio talk show in New York City). Sunshine was also heard in 1974 as a part of the new announcing crew at "The New WRAI" 1520, a station created by Bill Thompson and "Radio Man" after the format change from English to Spanish at WBMJ. Besides his short stint as a disc jockey, Logroño served as a voice actor for Puerto Rico's then-active dubbing industry. His was the Spanish-language voice for "Little Joe", one of the Cartwright brothers (played by Michael Landon) in the U.S. television show Bonanza.