NFL Connections #28, Answers
The full solution: all four groups and the 16 names, sorted from the easiest group to the trickiest.
San Francisco 49ers greats
Jerry Rice, Steve Young, Patrick Willis, Frank Gore
Seattle Seahawks greats
Steve Largent, Walter Jones, Cortez Kennedy, Marshawn Lynch
Los Angeles Rams greats
Aaron Donald, Eric Dickerson, Jackie Slater, Merlin Olsen
Arizona Cardinals greats
Larry Fitzgerald, Aeneas Williams, Pat Tillman, Roy Green