The usual suspects are headlining 2021 training camps: extensions, roster battles and hyped rookies.

However, some interesting wrinkles make this summer feel distinct. After a one-year hiatus, preseason action returns, albeit on a shortened three-game slate. There are also now three cut-down days, which makes the roster-whittling drama all the more intense across the league.

It can be hard for fans to keep up with all the noteworthy buzz. To assist, we'll run through one big takeaway from each training camp so far.

Arizona Cardinals: Jordan Hicks Situation Remains Muddy

The Arizona Cardinals drafted middle linebacker Zaven Collins 16th overall this year and in May gave veteran Jordan Hicks permission to seek a trade, according to NFL Network's Ian Rapoport.