NFL Connections #118, Answers
The full solution: all four groups and the 16 names, sorted from the easiest group to the trickiest.
Bears quarterbacks
Sid Luckman, Jim McMahon, Jay Cutler, Caleb Williams
Bears running backs
Walter Payton, Gale Sayers, Matt Forte, Neal Anderson
Bears pass catchers
Mike Ditka, Brandon Marshall, Alshon Jeffery, DJ Moore
Bears defensive legends
Dick Butkus, Mike Singletary, Brian Urlacher, Khalil Mack