One of the highlights of my experience with creating this website was having Jeff Johnson, Nike's first employee, contact me to help me with identifying a shoe as well as to let me know that he took all of the photos for this poster.
Here are my best identifications; additional information is welcome.
1st row left picture - Steve Prefontaine
1st row right picture - Scott Daggatt and Pre (would appreciate confirmation that that is Daggatt).
2nd row left- l-r at start: Steve Bence - Mark Feig - Steve Prefontaine - Scott Daggatt; Mike Long in second row visible between Pre and Daggatt
2nd row right - Pre - Matt Centrowitz Sr. - Scott Daggatt - Mark Feig
3rd row left - Arne Kvalheim (Is he Arne or brother Knut?) - Pre
3rd row right - Pre at the finish
4th row left - center - right: Pre-Pre-Pre