Arizona, Michigan and Duke had looked like a clear top tier in college basketball as conference play began. All three spent time atop the AP Top 25 and went on to claim a No. 1 seed in March Madness. Yet only the Wildcats and Wolverines have reached the sport’s biggest stage. The Blue Devils’ stunning loss to UConn on Braylon Mullins’ last-second 3-pointer ended the title push for the tournament’s top overall seed, leaving Arizona and Michigan as the only 1-seeds to reach the Final Four. That