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.
http://www.theadvocate.com/baton_rouge/sports/lsu/article_e6a52d16-91a1-11e7-a7f3-a3a681e8b7a3.html
LSU played 17 true freshman in their season opener this year... 77% of the freshman class played. I am trying to find more overall statistics but I think the true freshman excuse is crap too. Just another sign of bad recruiting if you expect ALL freshman to redshirt.