Born in Galveston, Texas, where he sang in church during childhood, he moved to Los Angeles, California as a teen and won several contests there as a singer. After this stage in his career, he moved to the Netherlands, where he had a hit in 1982 with the song, "Rock the Boat", a cover of The Hues Corporation's 1974 No. 1 US hit. His version peaked at No. 4 in the UK Singles Chart and in his native United States (No. 9 Hot Dance Club Play).
He and his wife, Manon Thomas, a television presenter had two sons, but later separated, after which he began to concentrate again on music. He sang in R.E.S.P.E.C.T., a theatre show, in 2001, dedicated to 1960s soul music. He was asked by DJ Roog to front the band Planet Hardsoul, who had a minor hit with their cover of "Where Did Our Love Go". In December 2012 Thomas married again, to Diana van Lippen.
- Roberts, David (2006). British Hit Singles & Albums (19th ed.). London: Guinness World Records Limited. p. 208. ISBN 1-904994-10-5.
- Doc Rock. "July to December 2013". The Dead Rock Stars Club. Retrieved 2013-09-14.
- Search for "Forrest" performed at Everyhit.com database; April 25, 2008.
- "Forrest: Awards". AllMusic. Retrieved 2013-09-14.