Spring practices are in full swing for college football teams, who are using this time to take a look at backups and early enrollees who may fill holes or contribute in other ways this fall.
For the star players and other returning starters, spring ball has a different emphasis, one based more on tweaking and fine-tuning.
Each team has at least one player that, for one reason or another, could be the make-or-break piece of the 2014 season's puzzle. These are the most important players in the country, and the ones whose impact matters the most for their respective squads.
Follow Brian J. Pedersen on Twitter at @realBJP.