Rob Gronkowski did not travel with the Patriots to Chicago and is "highly unlikely" to play on Sunday. The tight end has been battling ankle and back injuries and on Friday was listed as questionable on the injury report.
Gronk has battled a variety of injuries over his career, including back injuries that required surgery. Obviously if he isn't out there on Sunday it's a huge loss for New England.
Patriots fans are hoping the injuries aren't anything too serious and Gronk is missing Sunday's game more as a precautionary measure. New England has a much easier time of things when he's on the field.