Dunbar called JU play-by-play for both WPDQ and WMBR radio in the late 1960s and early 1970s. On WPDQ, Dunbar also had the responsibilities of doing the pre and post-game reports.
A winner of numerous awards, Dunbar has twice named the Florida Sportscaster-of-the-Year. He also won the best Daily Sports Show honor eight times in his storied broadcasting career. He earned individual recognition awards from such organizations as the Daytona Speedway. For a time, the Sports and Entertainment Commission awarded the Walt Dunbar Award for excellence in broadcasting.