The Facts: On Sunday, Jackson went down hard after a collision with another player during a 2-minute drill, and after taking a few more snaps in a non-contact 7-on-7 drill was unable to finish practice. Jackson, according to other players, suffered a blow to the head that most thought wasn't serious.

Diehards Line:HC Mike McCarthy was unaware of the extent of Jackson's injury immediately after practice, so it's unclear whether Jackson suffered a concussion. But as Journal Sentinel staffer Tom Silverstein suggests, if Jackson has suffered a concussion, his status for the exhibition finale is in question, especially considering the extra attention head injuries are being given around the NFL after recent criticism aimed at the league. ... Stay tuned. We'll have more on Jackson's status going forward as further details are released.