The Pistons need a defensive-minded big man to pair with emerging center Greg Monroe, and the top prospect for that position is North Carolina forward John Henson. But he’s also very thin, with no guarantees that he’ll put on the kind of weight necessary to avoid being pushed around in the NBA. Zeller, meanwhile, is a safer bet whom most talent evaluators expect to be a solid player on both ends. He averaged 16.3 points, 9.3 rebounds and 1.5 blocks as a senior while earning the ACC Player of the Year award. Terrence Jones will also likely be considered, or Detroit could reach for 7-foot defensive specialist Fab Melo of Syracuse.