6) Cornerback Captain Munnerlyn had a rough 2017. He didn't play nearly as much as he expected, and he wasn't close to his best when he was out there. That left the door open for Carolina to try something else at nickel in 2018. Perhaps James Bradberry – who had a rock-solid camp – and Kevon Seymour could man the outside spots with the rookie Jackson inside to get more speed on the field. But Seymour is battling inconsistency and he's not playing as fast as his 4.3 speed indicates. Plus, the staff might prefer Jackson focus on playing outside. Munnerlyn, meanwhile, worked as the first-team nickel throughout camp and performed well. He's played that position for years. Does he have another effective one in him? Will he get a chance to show it? Is he as "entrenched" at the nickel spot as Rivera indicated? We shall see.

7) Ian Thomas is going to make some mistakes and it might not always be textbook, but he's capable of winning the No. 2 tight end job. The rookie from Indiana is powerful and has surprising athleticism for his size. When he gets going downhill, defensive backs are going to have a tough time getting him on the ground. Mastering the playbook and effectively blocking will be challenges, but things are made a little easier when your No. 1 tight end is Greg Olsen. Oh, and when Luke Kuechly gives you a nod of approval, you're on the right track.

8) Speaking of rookies, some thoughts on guys that haven't been mentioned yet. ... Third-round safety Rashaan Gaulden plays with a physical edge. He's been improving steadily and could work his way into a prominent role. ... Fourth-round defensive end Marquis Haynes proved to defensive coordinator Eric Washington that he could be an exception to the rule. Haynes doesn't have prototypical size, but his motor and his explosiveness will get him on the field in certain situations. ... Fifth-round linebacker Jermaine Carter plays fast and he's instinctive – a pretty strong combination. He's going to push guys like David Mayo and Jared Norris.

9) We haven't learned all that much about the backup quarterbacks that we didn't already know before camp. The final three preseason games will be vital for Garrett Gilbert and Taylor Heinicke. And you still can't rule out the possibility of a veteran signing once we get closer to the opener against Dallas.