These trees have many branches
By no means is this list comprehensive -- that would probably require a book. Plenty of current coaches have just as prolific of a legacy as these six. This is simply meant as a snapshot look at different coaching trees in different parts of the country.
Jim Calhoun, Connecticut; former head coach Northeastern
Tom Izzo, Michigan State
Mike Krzyzewski, Duke; former head coach, Army
Mike Montgomery, California; former head coach, Stanford, Montana
Rick Pitino, Louisville; former head coach Boston University, Providence, Kentucky