Complex sentence: John Alfred "Footsie" Marcum (September 9,1909--September 10,1984) was a professional baseball pitcher, for seven seasons in Major League Baseball with the Philadelphia Athletics, Boston Red Sox, St. Louis Browns, and Chicago White Sox.
Split into simpler sentences: John Alfred "Footsie" Marcum (September 9,1909--September 10,1984) was a professional baseball pitcher. He played seven seasons in Major League Baseball for the Philadelphia Athletics, Boston Red Sox, St. Louis Browns, and Chicago White Sox.