Two FBS teams were upset by FCS teams today, the first full day of college football. Getting that "sure thing" win isn't a guarantee as the Beavers and Blue Devils found out today:
Sacramento State 29
Oregon State 28 (OT)
In about another dozen games, FBS schools narrowly got wins over teams from the lower subdivision. There are 46 more inter-subdivision matchups the next three weeks. Hopefully no more teams from the upper subdivision suffer embarrassment, but it is unlikely.