NFL Connections #81, Answers
The full solution: all four groups and the 16 names, sorted from the easiest group to the trickiest.
Pittsburgh Steelers
Terry Bradshaw, Franco Harris, Troy Polamalu, Hines Ward
Cleveland Browns
Jim Brown, Otto Graham, Joe Thomas, Ozzie Newsome
Cincinnati Bengals
Joe Burrow, Ja'Marr Chase, Anthony Munoz, Chad Johnson
Baltimore Ravens
Ray Lewis, Ed Reed, Jonathan Ogden, Lamar Jackson