The N.C.A.A. sent two members of its enforcement staff to Massachusetts this week to inquire about Nerlens Noel, who is the country’s top basketball recruit and has committed to play at Kentucky. Cindi Merrill and Frank Smith, assistant directors of enforcement with the N.C.A.A., went to Everett High School on Tuesday to meet with school officials about the 6-foot-10 Noel, who spent his freshman and sophomore years there. Merrill and Smith specialize in basketball-related issues. The Everett High School principal, Louis Baldi, said the meeting lasted an hour and 15 minutes and centered on “concerns we had as adults” for Noel.