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.

With spring practice underway for many 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.

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. Georgia's Jarvis Jones leads a fairly deep class of athletic defenders who should be capable of contributing on the next level.

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. The best inside linebacker prospect might be the most covered, most scrutinized prospect in the entire draft. Manti Te'o heads a class that isn't all that deep but has some elite playmakers at the top of the board.

Coming off a season where eight teams made bowl appearances, along with the rise of Stanford and Oregon into annual top-five status, the arrow on the Pac-12’s future is clearly pointing up.

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. The evolution of the tight end position has been interesting to track over the last few seasons. Smaller, quicker players are being lined up in the slot while bigger, more physical options are getting time in the backfield. Even the Colts drafted two tight ends last year, one to catch passes and stretch the field and the other to block and be a red-zone target.

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. The running back position has become one of the easiest to find in the middle and late rounds each year. For every Adrian Peterson taken in the first round, there has been a Ray Rice, LeSean McCoy, Arian Foster, Maurice Jones-Drew and Frank Gore. Running backs can be found deep in the draft, and in that sense, this is an excellent running back class. 

The battle to win college football’s 2013 national championship is officially underway. Spring practice kicked off for a handful of teams in February and will begin for most of the remaining FBS teams in March. While it’s often difficult to glean much from spring practice, it’s a time of new beginning for a1l 125 teams.

After earning three consecutive BCS bowl appearances, the bar is set high for Stanford in 2013. And the Cardinal return 14 starters from a team that won 12 games last season, so it's not out of the question David Shaw's team can compete for a spot in the national championship this season. The Cardinal has a favorable path to a Pac-12 North title but play Oregon and USC in a challenging November slate.