I saw the clip and explanation on Brad's Twitter... Apparently DU "stole" a recruit from SCSU last minute. Not sure if it was some guy who verballed to SCSU then signed with DU or what
http://lubbockonline.com/sports/2013-10-25/freshmen-players-making-big-impact-college-football-teams
According to this 2013 article 12% (359) of college football first or second stringers (3,212) were freshmen. Of those, 72 were starters.