NFL Connections #4, Answers
The full solution: all four groups and the 16 names, sorted from the easiest group to the trickiest.
Star receivers of the 2020s
Justin Jefferson, Ja'Marr Chase, CeeDee Lamb, Amon-Ra St. Brown
Hall of Fame receivers
Jerry Rice, Randy Moss, Terrell Owens, Cris Carter
Pittsburgh Steelers receivers
Antonio Brown, Hines Ward, JuJu Smith-Schuster, Santonio Holmes
Went undrafted
Wes Welker, Victor Cruz, Adam Thielen, Marques Colston