Ulis is believed to have a "pretty significant" hip issue that could end up requiring surgery, Steve Kyler of Basketball Insiders reports.

The injury isn't preventing Ulis from working out with teams, but the specter of surgery down the road could cause his draft stock to slide. Ulis' small stature (5-foot-10, 149 pounds) already likely has many teams ruling him out as a potential first-round selection, and the medical red flag represents yet another roadblock he might have to overcome.