He then became the first banjoist to truly "master and refine three-finger picking, developing a style that emphasized melody lines and a syncopated rhythm.
In 1944, Scruggs made his big debut when Bill Monroe, the "Father of Bluegrass", invited Earl to join his Monroe's Blue Grass Boys. They performed on the Grand Ole Opry, a famous country radio show broadcast live from Nashville, as well as on several nationwide tours.