Louis Riddick, Josina Anderson and Jeff Darlington identify the biggest weaknesses for some of the NFL's top contenders this season. (2:09)

Even the most optimistic NFL general manager can find something to worry about as the 2017 regular season approaches. Here's what all 32 teams should worry about, according to execs from around the league.

Note: Teams are listed in alphabetical order.

The worry: The hits will keep coming for QB Carson Palmer, leaving him diminished come playoff time.

Exec unfiltered: "They have [D.J.] Humphries starting at tackle, and that is a scary situation. They have had O-line issues in the past and still do. Humphries has never been consistent, and protecting a 36-year-old quarterback with a left tackle who has been inconsistent and hurt is an issue, especially when you know they are going to throw it a lot."

The worry: QB Matt Ryan and the offense will regress under a new coordinator, after Kyle Shanahan took the head-coaching job in San Francisco. Ryan (38 TDs, 7 INTs last season) averaged 27 TDs and 15 INTs from 2011 to 2015.

Exec unfiltered: "Kyle Shanahan got on such a roll calling plays for that offense last season, and now he is gone. Can you duplicate what they had with a new coordinator [Steve Sarkisian] who has never called plays in the NFL? I mean, every play Shanahan called worked. It was crazy."