Joseph Sloan Bonsall Jr. (born May 18, 1948) is an American singer who has been the tenor of the country/gospel vocal quartet The Oak Ridge Boys since April 1973. He is also an author. Besides charting numerous hits as a member of the Oak Ridge Boys, Bonsall has a solo chart credit alongside the band Sawyer Brown in their 1986 single "Out Goin' Cattin'", on which he was credited as "Cat Joe Bonsall". In 1997, Bonsall released a four-part children's book series titled The Molly Books and in 2003 published GI Joe and Lillie, a book about his parents' lives during and after World War II.