He started as a nightclub "scat" singer and he appeared to transition seamlessly into a career in movies and television. Some of his best work combined both acting and singing as is evident in the opening credits of Ralph Bakshi's Coonskin and as Fred Sanford's friend, Bow Legs, in a Sandford and Son episode entitled The Stand-In.
Scatman Crothers worked fairly steady throughout the 1960's and '70's and was seen and noticed in everything from The Shining to Black Belt Jones. At the time, many people were familiar with his name and his talents, but today, with the exception of the baby boomers, he seems to be mostly forgotten.
Thanks to DVD's and sites like Netflix and Hulu, a lot of his work is out there for all to discover. And when you do, you'll understand why Scatman Crothers is Not Very Famous...but should be.