5 moves from NFC North rivals that Packers fans should be worried about

Keenan Allen
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2. Jonathan Greenard signing with the Vikings

The Minnesota Vikings may have lost Danielle Hunter, but they didn't hesitate in NFL free agency to add another stud coming off the edge to help rush the passer. The loss of Hunter was addressed by Vikings GM Kwesi Adofo-Mensah by signing Texans free agent pass rusher Jonathan Greenard, an ascending player coming off of his best year as a pro.

Greenard set a career-best with 22 QB hits last season, 15 tackles for loss, 12.5 sacks, and 32 total pressures. He's been extremely productive in getting after the quarterback when healthy, and his last two healthy seasons in Houston yielded great results.

He's going to be a lot to handle off the edge when the Packers take on the Vikings.

3. DJ Reader signing with the Lions

Detroit was already tough in the trenches offensively. The last thing you need from that team is upgrading in the trenches defensively. The Lions were already second in the NFL last season in total run defense, and while they weren't nearly as effective against the pass, having a player like DJ Reader up front defensively is going to help in all areas.

Reader hasn't put up big numbers as a pass rusher historically, but his impact on the pass rush extends beyond QB hits and sacks. He helps others produce by occupying blockers, knifing through the line of scrimmage, and taking on double teams.