The Hollywood Reporter says Daryl Dragon has died at 76 on Wednesday.
He was known as the Captain from the group The Captain and Tennille.
Dragon came from a musical family and played keyboard for the Beach Boys from 1967 to 1972.
Dragon married Toni Tennille in 1975 and were together until 2014. They remained close friends, the Hollywood Reporter said.
He is survived by his older brother and two nieces.
(The Hollywood Reporter contributed to this report).
