Jackson didn't participate in any drills during the media-viewing portion of Monday's practice, which was a 90-minute walkthrough. He entered the indoor fieldhouse when reporters were leaving, walking with a slight hitch. Jackson wasn't present on the field when practice ended.
Harbaugh declined to say whether Jackson would be limited in practice Tuesday. Harbaugh did say the injury is not serious, but it's a short week as the team plays the Jets on Thursday. This is obviously a story to monitor for Jackson owners counting on him in Week 15 in a nice matchup against the Jets.