While it's unlikely that the Bengals will release information on Tyler Eifert's elbow injury anytime soon, it's generally believed that he suffered a dislocated elbow.
Eifert joined his teammates on the sidelines in the second half with his right arm in a sling, tweets ESPN Coley Harvey.
Eifert, not in uniform, is on the sideline and has his right arm in a sling, it appears. #Bengals
— Coley Harvey (@ColeyHarvey) September 7, 2014