Jackson, who is in the last season of a five-year contract, has not been at camp since the team was scheduled to report at Concordia University last Friday. The former Pro Bowler officially has been listed as a contract holdout.

When talking to reporters on Monday, Linehan said he has still not spoken to Jackson but has stayed in contact with him via text messaging.

"(Jackson) just says, 'I'm working, I ran today, lifted, how'd practice go,' that kind of stuff," Linehan said.

"We just kind of let him know where we're at and things that are going on. He's real focused on what's going on at camp, so his head's definitely in the right place."

The Rams and Jackson's agent, Eugene Parker, have been negotiating a long-term extension, and signing him is "a priority" Linehan said last Friday.

Drafted by the Rams in the first round in 2004, Jackson has rushed for more than 1,000 yards in three straight seasons. Last year, he ran for 1,002 yards despite missing four games with a variety of injuries.