Leftwich had success before Brady, though it was limited. 1 season with Jameis and his 5000 yards passing. As QB coach/OC for the Cardinals, he juggled 3 QBs in 2017 to a decent amount of success (15th in passing). In 2018, he had Josh Rosen which obviously didn't work out. He's definitely a guy I think can run a team, as a former NFL QB. He was always lauded for his leadership even back to his days at Marshall. I think he could build a staff. Best case scenario, he's a Mike Tomlin type. Should be a good leader of men. Great in the media. Do what he does well. But can he find a consistently strong DC? Tomlin has had a bunch of different OCs and the Steelers offense has been inconsistent a bunch, saved by a HOF QB when healthy. Daboll is the "safe" choice. He's a hot coaching name, a logical choice as the top candidate. But he's a very "inside-the-box" hire. He's the same type of hire as Nagy, Jason Garrett, and guys like Doug Pedersen and Adam Gase were (and many others). An OC under a good HC who has put together a good offense, developed a QB, and the next logical step is for him to be a HC to see if he can do it on his own. He's not the offensive genius like McVay or Shanahan. He's not innovative like the college guys have been seen. So a lot is going to depend on a bunch of other factors. Worst case, Nagy 2.0. Best case, he's coached under Belichick and Saban, so maybe he's the offensive version of Mike Vrabel and can surround himself with a strong coaching staff. Roman is interesting. I think his projections are all over the place. He's coached under both Harbaughs who have had a lot of success everywhere but against Ohio St. But I hate Jim Harbaugh as a coach (John is great). But he's had very mobile QBs in his career. Kaepernick, Tyrod Taylor, Lamar Jackson all have developed into solid, if not MVP level QBs that have taken teams to the playoffs. But the concern is those guys have been run a LOT. The QB run has been the main staple of those offenses. While Fields may have a similar profile as those guys (black and fast), he's much more of a passer than any of them. I worry about Daboll putting too many eggs in the QB run basket and not taking advantage of Fields' real strengths, throwing the ball down the field. Best case is he's a late developer like Frank Reich. He has a ton of experience, but never gotten a HC job. He has the worst, worst case though as he could get Fields killed if he proves he can't adapt.