Jackson (shoulder) participated in stretching and individual drills at practice Monday but didn't take part in team drills, Stu Jackson of the Rams' official site reports.
Jackson suffered a bruised scapula during training camp on the final day of July and has been held out of full practices since. It's not yet clear whether he'll be ready to return by Week 1 of the regular season. If he makes it back by then, Jackson is slated to start at left guard for Los Angeles.