I did not see in this article the mention that Jim Croce's first TV appearance was on the Johnny Carson show the night before he died As I witnessed this?

I did not see in this article the mention that Jim Croce's first TV appearance was on the Johnny Carson show the night before he died As I witnessed this?
Jim Croce was on Johnny Carson August 15, 1972 and May 30, 1973. Jim died on September 20, 1973.