NFL Connections #41, Answers
The full solution: all four groups and the 16 names, sorted from the easiest group to the trickiest.
Won multiple rushing titles
Jim Brown, Barry Sanders, Emmitt Smith, Earl Campbell
Led the NFL in receiving yards
Jerry Rice, Calvin Johnson, Michael Thomas, Cooper Kupp
Led the NFL in passing yards
Dan Marino, Drew Brees, Dan Fouts, Patrick Mahomes
Led the NFL in sacks
Reggie White, Michael Strahan, J.J. Watt, T.J. Watt