The end of October is when things really heat up in the college football season.
Some teams that were secure in their spots have to start watching their back because other contenders have made strong pushes, while others are just trying to stop from collapsing.
No team and no lead is safe at this point.There's still the "anything can happen" feel, but it's shrinking with every Saturday.
Conference matchups get more intense heading into November, and some teams have to make sure they don't have a letdown and ruin an entire season's work of preparation and hard work.
Here are five college football teams that have to watch their back.