Willis McGahee was a Pro Bowler a year and a half ago, but now someone (or someones) with far less experience is expected to shoulder the running back workload.
Elvis Dumervil is gone, and in his place is a contingent of guys with potential - but not Elvis's proven production.
Peyton Manning is healthier and stronger-armed than a year ago, but who knows how another NFL season will take its toll on his 37-year-old frame?
Which of these worry you?
The Denver Broncos are among the favorites to win it all this year, but to some, one or more of these represent a point of concern. My question to all of you - which starter on the 2013 Broncos worries you the most? If a starter hasn't been locked in stone (middle linebacker, defensive end, running back), consider the roster and the potential starter. I'm interested to see if the MHR crowd reaches a general consensus or are split on these issues.