I saw with Marshall in their glory days, I saw with WVU in the high scoring offense that McGee ran, as well as the high scoring offense of 2011 and 2012, as well as MANY of the high flying offensive oriented teams, that regardless of the style of defense run, it seems to suffer as games go on, I have thought that it was due to fatigue because the offense scores so quickly and puts the defense right back on the field. When the offense scores on the third play of the series, then the other team grinds it out for an 8 minute drive, and you repeat that throughout the game, the defense is going to get tired.