デ・ブール
The son of Elisabeth Schaap and Lammert de Boer, a baker in Kollum, Friesland, De Boer immigrated with his family to the United States in 1956. De Boer attended Holland Christian High School in Holland, Michigan before entering Michigan State University. He played soccer in both high school and college. In 1973, he signed with the Cleveland Stars in the American Soccer League. At the end of the season, the Stars came under new ownership who changed the team name to the Cleveland Cobras. He played one more season in Cleveland.