Conversation so far:
Was Frank Gifford's broadcasting career a success?
In 1971 Gifford replaced Keith Jackson as Monday Night Football's play-by-play announcer, and remained involved with the show for 27 of its next 28 years.

Question: Where did he work as a play-by-play announcer?
Self-contained rewrite: Where did Frank Gifford work as a play-by-play announcer?