NFL Connections #22, Answers
The full solution: all four groups and the 16 names, sorted from the easiest group to the trickiest.
Baltimore Ravens greats
Ray Lewis, Ed Reed, Jonathan Ogden, Terrell Suggs
Cleveland Browns greats
Jim Brown, Otto Graham, Joe Thomas, Clay Matthews
Cincinnati Bengals greats
Boomer Esiason, Anthony Munoz, Chad Johnson, Ken Anderson
Pittsburgh Steelers greats
Joe Greene, Jack Ham, Mel Blount, Rod Woodson