Clete Roberts (February 1, 1912 – September 30, 1984) was an American broadcast journalist. He began his career in radio news, then transitioned to television, working for stations in California. In later years, he portrayed himself and fictional broadcast journalists in entertainment media, such as in 1970s episodes of the TV series M*A*S*H.
From Wikipedia.

The Jerk
1979 · as Announcer

Testament
1983 · as Newscaster

Meteor
1979 · as Network Newscaster

The Last Hurrah
1958 · as Reporter (uncredited)

The Swinger
1966 · as Clete Roberts

The Phenix City Story
1955 · as Self, The Interviewer

Man on a String
1960 · as Narrator (voice)

Countdown
1967 · as Announcer (uncredited)

The Todd Killings
1971 · as Reporter in Courthouse

Memories of M*A*S*H
1991 · as Self

Heatwave!
1974 · as Newscaster

Portrait: A Man Whose Name Was John
1973 · as Clete Roberts