 Born and reared in Milwaukee, Wisconsin, Trimble taught himself the trombone at age five and later became a Wisconsin State champion trombonist.After serving in an Army band during World War II, Trimble played with various bands such as Tex Beneke, Ray Anthony and Glenn Miller prior to joining Welk in 1957.He appeared on the Maestro's weekly television show and toured with the band on their live concert tours for the next twenty-five years.