Complex sentence: Oboler sold his first radio scripts while still in high school during the 1920s and later found notoriety with his script contribution to the 12 December 1937 edition of "The Chase and Sanborn Hour".
Split into simpler sentences: Oboler sold his first radio scripts while still in high school during the 1920s. He pursued a career in radio and found notoriety with his script contribution to the 12 December 1937 edition of "The Chase and Sanborn Hour".