"I feel like I have a long offseason to heal up and recover for next year," Jackson said during a chat on the team's official Web site. "I am just a motivated person, so it doesn't take much. I love to play football. I love to compete."
"It's been whispered in my ear, and that's from people on my side looking out for best of my future," Jackson told reporters. "But I love to play, and we only have two games to play, so I'm just going to gut it out."
Medical staff has told Jackson that his back won't heal until the offseason, but he felt well enough to consider practicing last week if he hadn't been sidelined by flulike symptoms. The Rams canceled one practice Thursday after a confirmed case of swine flu to center Jason Brown, and Jackson also was out Friday.
"It's getting to the point where I'm managing to be able to take a few carries in practice," Jackson said. "I really want to do that for me and Keith so we can get on the same page with footwork, getting a feel for one another.
"It's not so much that the back's getting better, it's just a matter of just wanting to get that chemistry."
Null, a sixth-round draft pick, has been thrust into action because of injuries (Marc Bulger) and a combination of injury and illness (Kyle Boller). Jackson's presence gives Null a level of security.
"He plays unbelievable every week," Null said of Jackson. "The guy works his tail off, even when he's hurt. Going out there and having him behind you and protecting you makes you feel a lot more comfortable."
The Associated Press contributed to this report.