Boyd was injured in the first quarter following an incomplete pass. He leaped to attempt to grab a deep ball from Bengals quarterback Ryan Finley but was unable to traverse two Steelers defenders. When he landed he clearly slammed the back of his head to the turf. If Boyd can't clear protocol, Higgins and Green will ride as the top-two WRs for Week 16. Thomas and Erickson are up next on our depth chart but the Bengals passing game is limited these days.