NFL Connections #27, Answers
The full solution: all four groups and the 16 names, sorted from the easiest group to the trickiest.
Won exactly one Super Bowl (QB)
Drew Brees, Russell Wilson, Joe Flacco, Nick Foles
Won two Super Bowls (QB)
Eli Manning, Peyton Manning, Jim Plunkett, Ben Roethlisberger
Won three or more Super Bowls (QB)
Tom Brady, Joe Montana, Terry Bradshaw, Troy Aikman
Reached a Super Bowl but never won (QB)
Dan Marino, Jim Kelly, Fran Tarkenton, Cam Newton