Fields (thumb) doesn't have an injury designation for Sunday's game at Detroit.
This comes as no surprise after Fields logged three full practices during Week 11 prep. He'll thus put an end to a four-game absence Sunday and take over quarterback duties for the Bears for the first time since Week 6. Fields will aim to produce against a Lions defense that has given up the eighth-most combined touchdowns (17) to opposing QBs in nine games this season.