Piano.
Born in Spokane, Rowles came to Seattle in 1937 to study at the University of Washington but spent most of his time in Jackson Street jazz clubs, including the Black and Tan, where he recalled hearing tenor saxophonist Aaron Davis. Palmer Johnson and Julian Henson were both mentors to Rowles, who eventually dropped out of school and went to Los Angeles, where he became an internationally known pianist and vocal accompanist, playing and recording with Benny Goodman, Woody Herman, Dexter Gordon, and Gerry Mulligan and accompanying Billie Holiday, Peggy Lee, June Christy and others. In his late career, he was known for having mentored Diana Krall.
Jackson Street After Hours (print). https://en.wikipedia.org/wiki/Jimmy_Rowles