Jackson said after Wednesday morning's workout that his sprained left knee felt fine and that he experienced no problems moving around during drills. He participated in most of the activities, except for a full-team two-minute drill at the end.
Jackson was hurt on Saturday. He said his goal was to return by Wednesday.
He's competing with Sage Rosenfels for the starting job left wide open when Brett Favre decided to remain retired. Jackson missed time last August because of a knee injury, but he said this time it's not as serious.