Greatness is defined in so many different ways. Statistical production, individual awards, team success, longevity, supporting cast, level of competition, 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 running backs of the BCS era have been. Here are the Top 50 ball carriers since the BCS was implemented in 1998:

Running back is a position in transition in the ACC.

Miami’s Duke Johnson should contend for All-American honors, but there’s not much in the way of proven, all-conference options outside of the sophomore. Florida State’s James Wilder and Syracuse’s Jerome Smith rank as the next two players, but Virginia’s Kevin Parks and Clemson’s Roderick McDowell could have breakout seasons in 2013.

The ACC has an interesting mix of quarterbacks for 2013. Proven options like Clemson’s Tajh Boyd, North Carolina’s Bryn Renner, Virginia Tech’s Logan Thomas should be the conference’s top-three passers for all-conference honors. Miami’s Stephen Morris will have to adjust to a new coordinator to, but he could easily surpass last year’s numbers.

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.

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 its 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.

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.

With only two teams finishing in the final top 25 poll, 2012 was a down year for the ACC. Will 2013 be any different? On paper, the league should be stronger. Florida State will take a step back with the loss of a handful of key players, but Clemson could be a top-five team, and Miami, North Carolina, Georgia Tech and Virginia Tech are all worthy of top 25 consideration.

With the release of the 2013 ACC schedules, the countdown for the upcoming college football season has officially started. The ACC has expanded by two teams since last season, as Pittsburgh and Syracuse will join the conference from the Big East.