Coach Matt Eberflus told reporters that Fields is day-to-day, has been improving and is expected to start Sunday's home game against the Eagles.
"I think it's day-to-day," Eberflus said. "I think he is improving. I think he's feeling better and it's looking positive."
Despite not practicing, Fields was at Halas Hall Wednesday preparing for Sunday's game.
"He is in the building, so he's engaged," Eberflus said. "He's working through all of the plays. We've got the number of plays we always have, the runs and passes that we have on first and second down, all the things we do. He's engaged there and learning those as we go. He'll be fine."
Fields has blossomed into a dynamic dual-threat this season. He ranks eighth in the NFL in rushing and first among quarterbacks with 905 yards and eight touchdowns on 128 carries and has thrown for 1,896 yards with 13 TDs, 10 interceptions and an 85.4 passer rating.