NFL Connections #82, Answers
The full solution: all four groups and the 16 names, sorted from the easiest group to the trickiest.
Indianapolis Colts
Peyton Manning, Marvin Harrison, Reggie Wayne, Edgerrin James
Tennessee Titans
Steve McNair, Eddie George, Derrick Henry, Bruce Matthews
Houston Texans
J.J. Watt, Andre Johnson, DeAndre Hopkins, C.J. Stroud
Jacksonville Jaguars
Fred Taylor, Maurice Jones-Drew, Tony Boselli, Jimmy Smith