NFL Connections #99, Answers
The full solution: all four groups and the 16 names, sorted from the easiest group to the trickiest.
2012 draft class QBs
Andrew Luck, Robert Griffin III, Russell Wilson, Kirk Cousins
2021 draft class QBs
Trevor Lawrence, Zach Wilson, Justin Fields, Mac Jones
2005 draft class QBs
Aaron Rodgers, Alex Smith, Jason Campbell, Ryan Fitzpatrick
1998 draft class QBs
Peyton Manning, Ryan Leaf, Matt Hasselbeck, Brian Griese