In 1937, Byas moved to New York to work with the Eddie Mallory band, accompanying Mallory's wife, the singer Ethel Waters, on tour, and at the Cotton Club. He had a brief stint with arranger Don Redman's band in 1938 and later in 1939-1940. He recorded his first solo record in May 1939: "Is This to Be My Souvenir?" with Timme Rosenkrantz and his Barrelhouse Barons for Victor. He played with the bands of such leaders as Lucky Millinder, Andy Kirk, Edgar Hayes and Benny Carter. He spent about a year in Andy Kirk’s band, recording with him between March 1939 and January 1940, including a short solo on "You Set Me on Fire".