ESPN.com's Adam Schefter and Chris Mortensen have both reported that the Packers might try to acquire Jackson, and since the St. Louis Rams agreed to void the final year on his contract, Green Bay would essentially be looking at a half-season rental.
Cedric Benson suffered a Lisfranc injury on October 7, and he's not even available to play until December 9 (if he's healthy enough, of course; h/t ESPNMilwaukee.com).
In his stead, Alex Green has struggled to produce, and that's putting it mildly. In the three games since Benson's injury, Green has rushed the ball 64 times for 154 yards and zero touchdowns (2.4 yards per carry). He's having trouble seeing the entire field and often plunges into the fray when there is an alternate route available.
Jackson is a seasoned veteran who runs with vision and power, and believe it or not, he can still occasionally hit the corners with some speed.
With Aaron Rodgers running the Packers offense, there's no need for this team to possess an "elite" running back. All this team needs is someone who can come in and keep defenses off balance. Unfortunately, Green hasn't been able to do even that, and James Starks is not now, nor has he ever been, a full-time running back.
The Packers will more often than not gain an early lead on their opponent, but since the team's secondary isn't exactly playing lights-out football these days, teams with good passing attacks have an easy time of getting back into the game.
The best way to keep teams from getting back into the game is by utilizing a punishing ground game in the second half of games, thus keeping the clock moving and keeping the opposing offenses off the field.
Jackson is more than capable of chewing up yardage and burning up the clock. He still has some good tread on his well-used tires, and since the Packers wouldn't be on the hook for any long-term contract, it makes perfect sense to bring him in for the short term.
Having him in the lineup will save a lot of late-game headaches for the Packers and their fans.