NFL Connections #113, Answers
The full solution: all four groups and the 16 names, sorted from the easiest group to the trickiest.
HBCU legends
Jerry Rice, Walter Payton, Steve McNair, Michael Strahan
Small-school QBs
Carson Wentz, Joe Flacco, Tony Romo, Jimmy Garoppolo
Division II and III finds
London Fletcher, Ali Marpet, Pierre Garcon, Danny Woodhead
Ivy League products
Ryan Fitzpatrick, Sid Luckman, Calvin Hill, Zak DeOssie