Coach confidential: Marvin Bagley III or Michael Porter Jr.

Duke cruises behind Bagley's big game (0:57)

Marvin Bagley III scores 24 points and adds 10 rebounds as Duke crushes Utah Valley 99-69. (0:57)

Bagley or Porter? Porter or Bagley?

Since Marvin Bagley III announced his decision in August to reclassify into the 2017 class and enroll at Duke this season, the debate over the best NBA prospect in college basketball this season has heated up. DeAndre Ayton and Mohamed Bamba will be in the conversation, but right now, it comes down to Bagley and Missouri freshman Michael Porter Jr.