Top recruit Jabari Parker has signed his letter of intent to play basketball at Duke. The school announced Parker's signing Thursday — more than four months after he picked the Blue Devils over Michigan State, Florida, Stanford and Brigham Young during a nationally televised ceremony in Chicago. Because that decision came in December after the conclusion of the fall signing period, Parker had to wait until the spring signing period began April 17 to make it official. The 6-8 forward is one of the most highly touted recruits in years, earning a top-five ranking from the four major recruiting services. He's the first two-time Illinois Mr. Basketball winner and led Simeon Career Academy to four consecutive state championships.