George had a local group called the Rhythm Rascals, and he also played with Sonny James Loden and his family, as well as gospel singer Jake Hess.
The Rhythm Rascals consisted of Will Harvey Jones, James "Snookem" Turner, a fiddle player, and a Mr. Howell.
In 1942, Rollin joined Paul Howard's Arkansas Cotton Pickers playing an electric mandolin, where he received the nickname Oscar.
In the summer of 1944, Rollin, with WSM-AM's Grand Ole Opry, played tent shows with Eddy Arnold.
Johnny's wife Ruth Evelyn Sullivan was killed in a car crash near Evanston, Wyoming, on October 9, 1959, while traveling with the Grand Ole Opry.
They played a comedy act called Cicero and Oscar, opening shows for Arnold and His Tennessee Plowboys.
According to Rollin, they would "go out on the stage, and boy, we’d wang-bang them, get them all laughing and having a good time [Lonzo and Oscar got 20 minutes before Arnold.]
Besides persuading Steve Sholes of RCA Victor to get them a contract and landing them a spot on the Grand Ole Opry, he also hired Johnny Sullivan to manage a record store Arnold owned in Murfreesboro, Tennessee.
Written by Dwight Latham and Moe Jaffe, "I’m My Own Grandpa" became their signature tune and was recorded by many others.
In the duo's third incarnation, Lonzo and Oscar made a brief comeback in the 1970s when they recorded the album Traces of Life.
A departure from their earlier comedy material, the album consisted primarily of sentimental and religious songs.
The title track, a middle-aged man's tribute to home and people who (now deceased) made a difference during his formative years, reached No.
George continued recording throughout the 1950s; he released many songs on the Capitol, Mercury, RCA Victor, Intro, Todd, and Briar labels.
In the 1960s, he changed his stage name from Ken Marvin back to Lloyd George, where he released songs on Imperial Records.
After George stopped making records later in his life, he booked shows for Bill Monroe.