Joel Embiid, freshman center for the Kansas Jayhawks, has to be careful. Embiid is currently sidelined with a stress fracture in his back, and no one knows how long it will keep him off the court -- he may end up missing the opening weekend of the NCAA tournament. The 7-foot phenom is 19 years old with his entire basketball career ahead of him. Embiid, the Big 12 Defensive Player of the Year and a potential number one pick in June's NBA Draft, is stuck in a precarious situation. Right now, 10th-ranked Kansas is one of just a handful of teams capable of winning a national championship. Yet if Embiid returns to the game too soon, he risks damaging his back irreversibly.