Ulysses B. "Bobby" Nunn Snr. (September 20, 1925 – November 5, 1986) was an American R&B singer with the musical groups The Robins and original bass vocalist of The Coasters. He was born in Birmingham, Alabama, U.S., and died of heart failure in Los Angeles, California, U.S.
Nunn was a welterweight boxing champion in the U.S. Air Force. After his discharge in 1947 he moved to Watts, California. He became a member of the A-Sharp Trio with Billy Richards, Roy Richards, and Ty Terrell, and they eventually became The Robins. Nunn would record some duets with Little Esther as well as some solo recordings in the early 1950s. In 1952 he recorded for Sage & Sand Records with Bobby Byrd and Ty Terrell. Bobby Byrd is better known as Bobby Day of "Rockin' Robin" fame.
In 1955, Nunn and Carl Gardner split from The Robins to become The Coasters with Leon Hughes and Billy Guy. After leaving The Coasters, he teamed with another former Coaster Leon Hughes to record as The Dukes in 1959. Two singles were released "Looking For You" b/w "Groceries, Sir" (Flip #343), and "I Love You" b/w "Leap Year Cha Cha" (Flip #344).