Mike Tomlin has been head coach for 14 years of the Pittsburgh Steelers, one of the greatest NFL franchises ever. He has won a Super Bowl. He one of the best coaches ever, by W-L record. He is considered a top 3 NFL head coach today. My question is: For a coach of his experience and stature why doesn't he seem to have a coaching tree? Look at guys like Holmgren, Parcells, Schottenheimer and Belichick. Evidence: https://www.washingtonpost.com/grap...coaching-trees-connecting-every-active-coach/ Dozens of assistants from those head coaches have gone on to become NFL head coaches themselves. Why hasn't this happened with Tomlin? And before you mention Munchak, he was head coach BEFORE he ever worked for Tomlin so Tomlin doesn't get to claim him as one of his own.