Spring practice offers opportunities for players to make cases that they belong near or at the top of their respective position’s depth chart for the upcoming season. Final decisions often won’t be made until preseason camp, but there’s no doubt a strong impression in March can mean a lot come September. This is especially true for quarterbacks. In the coming weeks, many signal callers across the country will look to prove that they deserve to lead the first-team offense on the field in Week 1. SI.com is breaking down five of the most intriguing QB battles to track.