The defending national champions make their return to the practice field on Friday but not without a few question marks.

We've spent the past few months dissecting the rosters and debating the quarterback position, but soon we'll begin getting answers about this 2018 team. With the departure of so many talented players and NFL Draft picks, Nick Saban will have to retool his team with the next crop of four and five-star athletes. There's plenty of potential up and down the roster, but which of those players are going to step up and become the next stars in Tuscaloosa?

Former Alabama fullback Martin Houston shared his list of possible breakout players during 'The Blitz' this week and gave the reasons behind his picks. Check out that conversation in the video at the top of the page and listen to Martin every morning at 6 AM.