Robert Coleman Shevak, better known as Iggy Shevak, was an American jazz musician who played string bass with several leading jazz figures in the 1940s and 1950s. Shevak is also credited on recordings as Robert Shevak, Bob Shevak, Roger Shevak, Iggy Shevack, and as Richard Shevak.
After playing in bands in New York in the late 1930s and early 1940s, Shevak moved to Los Angeles in the late 1940s.
In April 1939, he was recording with a band led by Jack Jenney, backing vocalist Louise Tobin, with Hugo Winterhalter, Peanuts Hucko, and Bunny Bardach, among others. In September that same year, he was a member of a band comprising a slightly different lineup, but again with Jenney, Winterhalter, Hucko, and Bardach. In July 1941, he recorded with Sonny Dunham's band, featuring Uan Rasey, Pete Candoli, Paul Montgomery, and George Fay, among others, and again in March 1942, with a similar lineup, but including Kai Winding.
In May 1945, he recorded with Georgie Auld's orchestra, comprising Al Porcino, Serge Chaloff, Joe Albany, Turk Van Lake, Stan Levey, among others, and with Tadd Dameron as arranger. In December 1945 or January 1946, he recorded with Shorty Rogers, Kai Winding, Shorty Allen, Stan Getz and Shelly Manne for Savoy Records.
In October 1948, he recorded as a member of the Teddy Edwards Quintet, with Herbie Harper (trombone), Hampton Hawes (piano) and Roy Porter (drums). In September 1949, he recorded again as a member of Sonny Criss's band, with Chuck Thompson on drums, and again with Hampton Hawes.