NFL Connections #121, Answers
The full solution: all four groups and the 16 names, sorted from the easiest group to the trickiest.
Seahawks quarterbacks
Russell Wilson, Matt Hasselbeck, Geno Smith, Dave Krieg
Seahawks running backs
Marshawn Lynch, Shaun Alexander, Curt Warner, Kenneth Walker III
Seahawks pass catchers
Steve Largent, Doug Baldwin, DK Metcalf, Tyler Lockett
Seahawks defensive legends
Richard Sherman, Earl Thomas, Kam Chancellor, Cortez Kennedy