NFL Connections #51, Answers
The full solution: all four groups and the 16 names, sorted from the easiest group to the trickiest.
Great kickers
Adam Vinatieri, Justin Tucker, Stephen Gostkowski, Jan Stenerud
Great punters
Ray Guy, Shane Lechler, Johnny Hekker, Pat McAfee
Electric return men
Devin Hester, Josh Cribbs, Dante Hall, Gale Sayers
Missed an infamous playoff kick
Scott Norwood, Cody Parkey, Blair Walsh, Mike Vanderjagt