Douglas Raymond Clifford (born April 24, 1945) is an American drummer who is nicknamed "Cosmo".

[1] He is best known as a founding member of Creedence Clearwater Revival for which he was inducted into the Rock and Roll Hall of Fame in 1993.

After the group disbanded in late 1972, Clifford released a solo album and later joined CCR bassist Stu Cook in the Don Harrison Band.

An early influence on Clifford's playing was The Beatles, with their appearance on The Ed Sullivan Show in February 1964 being of particular significance.

[3] Clifford attended San Jose State University alongside Stu Cook.