The coaching careers of Bill Walsh, Joe Gibbs & Bill Parcells were great in their own right, but the legacies they created continue to impact today’s NFL. All 32 CURRENT coaches are from the Walsh or Parcells “coaching trees.” Yes, all 32. #gutsandgenius https://t.co/PoylJnqm8f

— Bob Glauber (@BobGlauber) December 18, 2018