The brothers were born on August 30, 1941, in Chicago, Illinois,[citation needed] and adopted by Jack and Frances Hager, a Methodist minister and a schoolteacher.
After leaving the military, the Hager brothers moved to California and performed at the Ledbetter's Night Club in Los Angeles with The Carpenters, The New Christy Minstrels, John Denver, Steve Martin, and Kenny Rogers.
The brothers served as opening acts for Owens, Tex Ritter, Wynn Stewart, Billie Jo Spears, and Lefty Frizzell.
"[2] The Hager brothers signed with Capitol Records in 1969 and hit the country charts with "Gotta Get To Oklahoma ('Cause California's Gettin' To Me)".
Their TV appearances also include the original The Bionic Woman, in which Jim and Jon played cloned detectives Verm and Dier in the February 11, 1978, episode "Sanctuary Earth.