There have been a lot of changes in the Top 25 throughout this college football season.
The current trend sees teams getting on a roll, followed by huge losses that which kick them back out of the Top 25. Teams are constantly going in and out and it makes it tough judge which teams are for real and which are busts.
The underdogs are consistently winning, and some big time programs are struggling this year. Here are five teams that are knocking on the door to break into the Top 25 this weekend.