Philadelphia's decision to pick Chip Kelly as its head coach will be one of the most intriguing and heavily scrutinized hires in NFL history. Kelly was a traditional college coach, as he ran an up-tempo, spread offense that most don’t believe will work on a consistent basis in the NFL.

College football’s coaching carousel was in full effect this offseason. Thirty programs will have a new head coach in 2013, ranging from Arkansas, Auburn, Kentucky and Tennessee in the SEC to FBS newcomer Georgia State in the Sun Belt.

Recruiting is reaching a fever pitch as the college football machine churns toward National Signing Day 2013. The first Wednesday in February is the NCAA’s version of Christmas morning for fans and coaches alike. Great coaching is the key to winning, but so are great players. If your team has better athletes, generally speaking, it will win the game more often than not.

That doesn’t mean that every five-star is an All-American or every two-star is a Sun Belt third stringer.

Recruiting rankings are an inexact science, and even the experts will admit that. It is virtually impossible to measure heart, work ethic, mental focus and self-awareness in 17- and 18-year-old kids. Especially, in the face of the most important decision they will ever make.

The top prospects of the 2007 signing class was a cautionary tale of sorts.

USC was the big winner on National Signing Day that year as the Trojans claiming four of the top 10 prospects in one of the final classes of Pete Carroll’s tenure. The top prospects, though, didn’t pan out. Of Everson Griffen, Joe McKnight, Chris Galippo and Marc Tyler, none of USC’s top four prospects made first-team all-conference.

The phrase “SEC Speed” instantly conjures images of glory, victory and pride for one region in the country and thoughts of depression, agony and exasperation for every other part of the nation. But after claiming their seventh national championship in a row, the SEC has a right to claim the best programs, players and coaches.

But why is that?

The early entry deadline to the NFL Draft is always a nervous time for many coaches in college football. Even though most coaches have an idea of which players will be back for the next season, there’s always a few surprises. And of course, it’s never easy to replace a potential first-round pick with an unproven player.

With college football’s 2012 season completed, it’s time to take a look back at the season that was and review the performance of all 124 teams before 2013 kicks off.

Twenty-eight coaches made their debut at a new program in 2012 and produced a mix bag of results.