When Nesmith left to help create The Monkees, he was replaced by Dallas native Michael Martin Murphey.
[2] Castleman and Murphey wrote "(What Am I Doin') Hangin' Round," (also as Lewis and Clarke), which was recorded by the Monkees and featured on three episodes of their television show.
The duo's songs were also recorded by such musicians as Lyle Lovett, Ray Wylie Hubbard and Rusty Wier.
"[1][3] As a solo artist, Castleman hit the US charts in 1975 with the single "Judy Mae",[2] which peaked at No.
"[5] As a Nashville studio guitarist, Castleman backed such singers as Tammy Wynette, Linda Ronstadt, Kenny Rogers, George Jones, and Roy Clark.