Wyatt Robert "Bull" Ruther (February 5, 1923, Pittsburgh – October 31, 1999, San Francisco) was an American jazz double-bassist. Ruther played trombone in high school before picking up the double-bass. He studied at the San Francisco Conservatory of Music and the , then played in New York City with Dave Brubeck (1951–52) and Erroll Garner (1951-55). He toured with Lena Horne in 1953 and recorded an album under his own name alongside Milt Hinton in 1955 for RCA Records entitled Basses Loaded. Following this he played with Toshiko Akiyoshi in 1956, then studied at the Royal Conservatory of Music in Toronto, Canada. While in Canada he played with the (1956–57) and Peter Appleyard (1957). He played in the U.S. during the same period with Ray Bryant, Zoot Sims, Bob Brookmeyer, and Chico Hamilt