PHILADELPHIA (CBS) --- Football is back!

In his first offseason with personnel control, Eagles head coach Chip Kelly made a ton of roster moves. With the plethora of new faces in Philadelphia, comes a tremendous amount of intriguing storylines.

With OTAs beginning this week, here are the top three Eagles' storylines of the summer.

3. Secondary

The Eagles made some major moves in their secondary, which was the weakest part of their 10-6 team last season. First and foremost, the Eagles cut both of their starting cornerbacks in Bradley Fletcher and Cary Williams. They also released safety Nate Allen. In the offseason, the Eagles signed former Oregon corner Walter Thurmond and former Seahawks corner Byron Maxwell.

In the draft, the Eagles selected defensive back Eric Rowe in the second round.

Who starts opposite Maxwell at corner? Who starts opposite Malcolm Jenkins? Don't forget guys like Jaylen Watkins, Earl Wolff, Brandon Boykin, and Nolan Carroll are in the mix as well.

2. Wide Receiver

The Eagles' first-round pick is former USC wide receiver Nelson Agholor, and some suspect he could be the best rookie wide receiver in the NFL. Jordan Matthews said Agholor is taking cabs to practice early, rather than the rookie shuttle.

After losing Jeremy Maclin to free agency, Agholor, Matthews, Riley Cooper, Josh Huff, and new Eagle Miles Austin will be forced into critical roles.

1. Quarterback

Goodbye Nick Foles, hello Sam Bradford and Tim Tebow!

How will Bradford rebound from his injury? Will Tebow make the roster? Who will start Week 1? So many questions at the most intriguing position in sports.