NFL Connections #110, Answers
The full solution: all four groups and the 16 names, sorted from the easiest group to the trickiest.
Bills quarterbacks
Jim Kelly, Josh Allen, Doug Flutie, Drew Bledsoe
Bills running backs
Thurman Thomas, Fred Jackson, James Cook, Willis McGahee
Bills pass catchers
Andre Reed, Stefon Diggs, Eric Moulds, Lee Evans
Bills defensive legends
Bruce Smith, Cornelius Bennett, Darryl Talley, Von Miller