Jackson signed a six-year, $44.8 million deal in 2008 and is scheduled to receive $7 million in base salary in 2012 and 2013.
Given Jackson's dissatisfaction, it might make sense for the Rams to try to select a running back, such as Alabama's Trent Richardson, in this week's NFL draft. The Rams currently have the No. 6 overall pick but could try to trade up for Richardson, whom some link to the Cleveland Browns (No. 4) and Tampa Bay Buccaneers (No. 5).
"Me personally, I think that's the way we should go in the first round ... adding some more tools and talent around (quarterback) Sam (Bradford) so he can definitely show his ability to be an elite quarterback," Jackson said.