Dave Chappelle: 'I never quit. I'm 7 years late'

NEW YORK -- Dave Chappelle says he never quit his Comedy Central show. He's just seven years late to work.

Chappelle appeared on "The Late Show With David Letterman" on Tuesday night, his first late-night appearance in more than six years. Chappelle has kept a mostly low-profile since abruptly exiting "Chappelle's Show" in 2005.

Said Chappelle: "Technically, I never quit. I'm seven years late for work."

The 40-year-old comic next week begins a string of stand-up performances at Radio City Music Hall. Chappelle announced on Letterman that the rapper Nas will join him for his June 23 show.

The comedian acknowledged he sometimes misses the lucrative payoff of his Comedy Central contract.

He says "the only difference between having $10 million and $50 million is an astounding $40 million."