NFL Connections #3, Answers
The full solution: all four groups and the 16 names, sorted from the easiest group to the trickiest.
Rushed for 2,000 yards in a season
Eric Dickerson, Chris Johnson, Jamal Lewis, Adrian Peterson
No. 1 overall pick RBs
Billy Sims, George Rogers, Bo Jackson, Ki-Jana Carter
Hall of Fame running backs
Walter Payton, Marshall Faulk, LaDainian Tomlinson, Curtis Martin
Star backs of the 2020s
Christian McCaffrey, Nick Chubb, Josh Jacobs, Bijan Robinson