Willis reverted to the Bears' practice squad Monday, per the NFL's transaction log.
Willis was signed to the Bears' practice squad Dec. 18 to serve as additional depth after Andy Dalton (undisclosed) was placed on the reserve/COVID-19 list. The 25-year-old didn't play, as Nick Foles led Chicago to a 25-24 victory over the Seahawks. Willis will now head back to Chicago's practice squad.