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.

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.

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

With spring practice underway across college football, most of interest will focus on quarterback battles or incoming freshmen that enrolled early to get a jumpstart on making an impact for 2013.

The start of the 2013 college football season is still months away, but it’s never too early to start thinking about preseason predictions and some of the top games to watch in each conference.

With no clear favorite entering spring practice, the Big 12 should be college football’s most intriguing conference to watch when preseason picks are released for 2013.

Each year a unique set of prospects enters the professional ranks with a chance to make an immediate impact on the country's most powerful sport. The 2013 NFL Draft, held April 25-27, won’t be any different. If the quarterback is the most important player on the field and the guy who protects the quarterback — the left tackle — is the second-most valuable position on the field, then the player who can neutralize both must be No. 3, right? The defensive end position varies from scheme to scheme, but the goal is the same: get pressure on the quarterback.

The start of spring practice for all 125 college football teams is a chance to start fresh and forget the bad results that came along with 2012. For a handful of coaches, spring practice is also the first opportunity to turn around a program and save their job for 2014.

Millions of dollars are made and lost at the NFL Combine and 2013 won’t be any different. Player interviews, mental acumen, agility, strength and speed tests all help NFL scouts, executives and coaches attempt to quantify over 300 different prospects over one weekend in Indianapolis.