The Facts: Jackson has a mild concussion and is questionable for Thursday's preseason finale at Tennessee. Jackson suffered the injury in practice on Sunday. It is his first concussion, HC Mike McCarthy said, but the team plans to address it cautiously. "It's something that we're going to be very cautious with," McCarthy said. "We'll see how he's doing later today and then in the morning."

Diehards Line:McCarthy said Noah Herron, the only non-rookie running back expected to play, would start Thursday if Jackson cannot. DeShawn Wynn also is expected to get a lot of carries, which coaches hope will free up Corey White to play some snaps at fullback. ... As for Jackson, the fact his concussion is mild has to be viewed as a positive. We'll continue to follow this one and update further as developments warrant.