Complex sentence: Ralph Sutton, a famous traditional jazz stride pianist, was born in Hamburg in 1922 and in his early years of playing during the 1930s, would have been found performing in his father's band at the Riverview Park dance hall in Hamburg.
Split into simpler sentences: Ralph Sutton, a well-known traditional jazz stride pianist, was born in Hamburg in 1922. In the early years of his career during the 1930s, he performed in his father's band at the Riverview Park dance hall in Hamburg.