Gronkowski missed about a week late in the preseason after exiting a joint practice with the Bears on Aug. 15. He returned to the field on Aug. 24 and participated in three straight practices.
The nature of the injury Gronkowski suffered during the joint practice against the Bears is not known. He pulled up short on a route, slowly paced the field afterward, and eventually left with a trainer. He did not need the trainer's assistance to walk, nor did he exhibit much of a limp. Gronkowski did not play in any of the Pats' preseason games.