Northwestern quarterback Kain Colter, who finished his college career last season, is the spokesman for the players' effort to unionize. John Mersits /CSM/Landov hide caption

itoggle caption John Mersits /CSM/Landov

Part of the special design to be worn by Northwestern University football players on Nov. 16. Facebook.com/UnderArmourFootball hide caption

itoggle caption Facebook.com/UnderArmourFootball