Jackson injured his hamstring during Wednesday's practice and was seen walking around afterward with a large wrap of ice around his leg, according to the newspaper.
Maclin, who returned after suffering a hip injury in Sunday's season-opening win against the Cleveland Browns, has not practiced the last two days.
Jackson and Maclin's status are uncertain for Sunday's matchup.
Earlier this week, the Eagles signed wide receiver Mardy Gilyard, who was released during training camp. Riley Cooper (collarbone), injured during training camp, returned to practice this week but isn't expected to play.