The spring has been spent breaking down which offenses (quarterbacks, running backs and wide receivers) will define the upcoming college football season, so it's now time to look at what ultimately wins championships: the defenses.
The Georgia Bulldogs broke their 41-year title drought, then followed it up by becoming the first back-to-back champion in a decade, behind a stellar defense featuring a number of future NFL players. It comes as no surprise that the Bulldogs come in ranked No. 1 in ESPN's top 10 defenses, but which teams, if any, can challenge the reigning champs defensively?