Complex sentence: Born to immigrants from Yugoslavia who had settled in Johnstown, Dezelan served in the United States Navy during Korean War and played baseball during military service and on the sandlots of Cambria County.
Split into simpler sentences: Born to immigrants from Yugoslavia who settled in Johnstown, Dezelan served in the United States Navy during the Korean War. He played baseball during military service, and on the sandlots of Cambria County.