The luckiest back-to-back QB run in NFL history is very likely to be the Pats snagging Tom Brady in the 2000 sixth-round, riding him to 9 SBs and 6 Chips, only to immediately replace him with a hungry Cam Newton on a cheap one-year “prove it” deal — and with a young and cheap Jarrett Stidham waiting in the wings.
Well snagging Tom Brady was one thing, but those other guys have done nothing, yet. So I'll go with Brett Favre and Aaron Rodgers. Or maybe Joe Montana and Steve Young. Come to think of it Chris Simms and Jeff Hostetler have to be mentioned. And people tend to forget the Houston Oilers went from Warren Moon to Steve McNair. But that's only because they went from being the Houston Oilers to the Tennessee Titans. The combo of Joe Flacco and Steven Jackson should be put on the list ahead of Romo and Dak.
But if the Pats can make a real run at it for the next couple of years, I'd have to really tip my hat to Belichick then. Because all of his SB wins came with Brady at the helm, so some still wonder if its Brady or Belichick that deserves most of the credit. But heck just going from Bledsoe to Brady was a blessing for them when you think about it.