Calvert DeForest, cult status as oddball on Letterman show

Mercury News:

Calvert DeForest, the white-haired, bespectacled nebbish who gained cult status as the oddball Larry “Bud” Melman on David Letterman’s late night television shows, has died after a long illness.
Mr. DeForest, who was 85, died Monday at a hospital on Long Island, Letterman’s “Late Show” announced Wednesday.
He made dozens of appearances on Letterman’s shows from 1982 through 2002, handling a variety of twisted duties: singing a duet of “I Got You, Babe” with Sonny Bono, doing a Mary Tyler Moore impression during a visit to Minneapolis, handing out hot towels to arrivals at the Port Authority Bus Terminal.

Here.