Overtime Elite is a fledgling league for teenagers with N.B.A. aspirations.  Based in Atlanta, Georgia with a new 1,200 seat Arena, these are the youngest professional basketball players in U.S. history.  Dan Porter and Zack Weiner started a basketball business called Overtime.  Porter, 55, is a great-nephew of the economist Milton Friedman.  A digital entrepeneur, he ran a gaming studio that became Omgpop.  Before that he spent a decade in education, including a stint as president of Teach for America.  Weiner, now 29, comes from a different generation.  A three time Ivy League chess champion at Penn, he was barely past graduation when he and Porter started Overtime.  They have 1.6 billion views of their content monthly.  Their new venture is a professional league for teenagers that will take the place of high school and college competition.  Overtime is backed by the venture-capital firm Andreessen Horowitz and a roster of investors that include Besos, Drake, Reddit's Alexis Ohhanian and four owners of NBA franchises.                      For the it's first season, the league has grouped 27 players, ranging in age from 16 to 20, into three teams of nine.  They compete against one another and against high school and international teams.  Overtime Elite's coaching staff is run by Kevin Ollie, who coached UConn to a national championship on 2014.                            Each player gets a small share of the company and earns a salary of at least $100,000 annually, plus bonuses, depending on the contract he has negotiated.  They are also allowed to strike their own deals with sponsors in noncompetitive categories.                     The players are required to spend as much as 20 hours a week in an academic setting, a mash up of online classes, face to face instruction and guest lectures.  Players are taught how to give news conferences and use social media.  They learn how agents and sponsors operate.  They also take basketball-focused versions of conventional subjects, math and history and English, so they will have fulfilled the necessary requirements if they ever want to apply to college.  If basketball doesn't work out, Overtime Elite promises to pay $100,000 towards a degree to any player who wants to get one.  After academics and lunch, the players return to the van for the ride to practice.  They arrive home at 6pm, having been out all day.  Their apartments, which are paid for by Elite Overtime, include four bedrooms, a kitchen and a living room.  One bedroom is kept empty for storage.  One unoccupied suite has been designated for use as a social center.