NBA commissioner David Stern and Dallas Mavericks owner Mark Cuban, a pair of basketball power brokers who have differed on plenty of topics over the years, agree that they’d like to get rid of the one-and-done trend with draft prospects. The rules currently require an American player to be 19 years old and a year out of high school to declare for the NBA draft, which is why the lottery is littered when phenoms coming off their college freshman seasons each year.