A college football season truly starts with the first big upset.

Game on.

No. 3 Georgia became the highest-ranked team to lose to an unranked team this season. The Bulldogs were popped 20-17 in double overtime by 24-point underdog South Carolina, which had to play its backup quarterback after halftime — on the road.

This season had felt especially stagnant for the first six weeks, with the same six teams — Alabama, Clemson, Georgia, Ohio State, LSU and Oklahoma — sitting at the top of the AP college football poll since preseason. Only one top-10 team had lost to an unranked team until this wee...