Conversation so far:
When did David Letterman move to LA?
In 1975, encouraged by his then-wife Michelle and several of his Sigma Chi fraternity brothers, David Letterman moved to Los Angeles, California.
Why did David Letterman's fraternity brothers and then-wife Michelle encourage him to move to Los Angeles?
David Letterman moved to Los Angeles, California, with hope of becoming a comedy writer.
What did David Letterman do when he got to Los Angeles?
In Los Angeles, David Letterman began performing comedy at The Comedy Store.
Was David Letterman successful from the start of his time performing at the Comedy Store?
Jimmie Walker saw him on stage; with an endorsement from George Miller, Letterman joined a group of comedians whom Walker hired to write jokes for his stand-up act.
How long was David Letter in a group of comedians Jimmie Walker hired to write jokes?
By the summer of 1977, Letterman was a writer and regular on the six-week summer series The Starland Vocal Band Show, broadcast on CBS.
Were there any reviews of David Letterman's work?
David Letterman's shows have garnered both critical and industry praise, receiving 67 Emmy Award nominations, winning 12 times in his first 20 years in late night television.
Are there any other interesting aspects about the critical reception of David Letterman's work besides receiving industry praise and 12 Emmy awards?
Letterman became a favorite of Carson and was a regular guest host for the show beginning in 1978. Letterman credits Carson as the person who influenced his career the most.

Question: Does he credit anyone else?
Self-contained rewrite: Does David Letterman credit anyone else besides Carson for influencing his television career?