Al Rinker Biography (Wikipedia)
Al Rinker (December 20, 1907 – June 11, 1982) was an American musician who began his career as a teen performing with Bing Crosby in the early 1920s in Spokane, Washington in various musical groups. In 1925 the pair moved on to Los Angeles, eventually forming the Rhythm Boys trio with singer/songwriter/pianist Harry Barris.
Barris wrote the songs "Mississippi Mud", "I Surrender, Dear", and "Wrap Your Troubles in Dreams" among others. The singing group worked with Paul Whiteman's Big Band for three years. They went out on their own for a year until Crosby effectively dissolved the group to go solo. The Rhythm Boys were filmed for the Paul Whiteman movie The King of Jazz (1930) singing "Mississippi Mud", "So the Bluebirds and the Blackbirds Got Together", "A Bench in the Park", and "Happy Feet". According to a filmed interview of Rinker, Crosby performed the first two weeks on his first film while on daytime work release from jail after crashing his car into a telephone pole while driving drunk. After the Rhythm Boys broke up, they reunited only once, to appear together on the Paul Whiteman Presents radio broadcast on July 4, 1943.