With no clear No. 1 quarterback returning for 2013, the Big 12 has an intriguing blend of potential and uncertainty surrounding the most important position on the field.

It seems every college football season has an active coaching carousel at the end of the year. Athletic directors are always looking for the next big thing, and there is no shortage of coaches looking to make the jump to a top-tier BCS program.

The college football season is still months away, but it’s never too early to start thinking about which assistants will be atop athletic director’s wish lists to fill open vacancies after 2013.

Coaching is one of the driving forces in building a national championship team or program. No matter how much talent a program has, it can’t win a national title if the coaching is questionable.

Considering how important coaches are to teams or even making preseason predictions, Athlon is taking a look at how all 125 college football coaches rank nationally.

Most college football fans associate the word “hot seat” with coaching changes. While that term mostly applies to the men on the sideline, it can also factor into the discussion of quarterbacks. Every coach preaches competition under center in the spring, but the reality is only a handful of quarterback battles are really open.

Coaching is one of the driving forces in building a national championship team or program. No matter how much talent a program has, it can’t win a national title if the coaching is questionable.

Considering how important coaches are to teams or even making preseason predictions, Athlon is taking a look at how each conference stacks up with head coach rankings for 2013.

Barring any late movement, college football’s coaching carousel for 2013 has ended.

As with any offseason, there were plenty of changes nationally. Over 100 coordinator jobs have changed hands from 2012 and there were numerous moves among the assistant ranks.

With spring practice underway for most college football teams, the countdown to the 2013 season has officially started. With preseason predictions right around the corner, it’s never too early to start thinking about which players might be the next breakout stars. 

Greatness is defined in so many different ways. Statistical production, individual awards, team success, longevity, supporting cast, raw talent and athletic ability all factor heavily in determining overall greatness. Sometimes, you simply know greatness when you see it.

So all factors were considered when trying to determine who the greatest quarterbacks of the BCS era have been. Here are the Top 50 signal callers since the BCS was implemented in 1998:

* - active, ** - not all seasons played in BCS era

Heisman Trophy trends finally appear to be changing. Defensive players are getting invited to New York City with increased regularity as one player from that side of the ball has been a finalist in three of the last four seasons. The age stigma has fallen by the wayside as well with Tim Tebow and Johnny Manziel each winning the award in just their second seasons on campus.