Swift dealing with groin issue

Kyle Meinke of MLive.com reports that Lions RB D'Andre Swift has "missed significant practice time while nursing a sore groin." According to Meinke, Swift has been on the field "almost every day" but generally sits out 7-on-7 and full-team work. Detroit clearly isn't too worried about the situation, or the team would have Swift sitting out altogether. But it'll certainly be an issue to monitor going forward. The Lions also watched rookie RB Jermar Jefferson leave Monday's practice with a leg injury. Meinke reports that Jefferson has been "having a nice camp." We'll see how long he's out and what role the rookie fills in preseason games.