The eligibility chaos playing out in lawsuits and courthouses all over the country has reached the basketball season. The first Division I men's and women's basketball games start Sunday. Yet that comes as legal cases tied to eligiblity inch their way through the court system. Many cases are centered on the NCAA's adoption of an age-based model giving athletes a fifth year going forward. Others deal with athletes returning to college after signing with professional teams. The cases have created volatility with players still waiting to be cleared or facing hearings that could change their status abruptly during the season.