Born on May 21, 1947 in Oakland, California; a singer, songwriter, guitarist, keyboard player, arranger and producer best known for his work with Chicago. Earlier work with the Sons of Champlin and as a songwriter includes work with Patti LaBelle, Lou Rawls, Elton John, Boz Scaggs, Donna Summer, Nancy Wilson, George Benson, Jimmy Smith, Amy Grant, Neil Diamond and Kenny Rogers.Father of Will Champlin.