In 2013 USA Basketball selected 6 college players, 4 rising college freshmen (Coffey, Plum, Green and Harper) and 2 rising High School seniors (Turner and Wilson). 6, 4 and 2.
In 2015 USA Basketball selected 6 college players, 3 rising college freshmen (Napheesa, Anigwe and Patberg) and 3 rising High School Seniors (Cox, Dangerfield and Slocum). Remember that Lou was replaced at the last minute by Slocum so the initial numbers were 6, 4 and 2.
In 2017, USA Basketball Selected 9 college players, 2 rising college freshmen (Walker and Carter) and 1 rising High School Senior (Williams). 9, 2 and 1.
USA Basketball decided to go with more experienced players at this year's world championships.