Hockenson got banged up during Tuesday's practice and exited early with an undisclosed injury, Justin Rogers of The Detroit News reports.
Head coach Dan Campbell used the words "minor" and "precautionary" when discussing Hockenson, who subsequently missed practice Wednesday, per Chris Burke of The Athletic. Even if his injury isn't serious, the tight end isn't likely to play in Friday's preseason opener against the Bills. Hockenson's absence would leave Darren Fells as Detroit's top tight end, followed on the depth chart by a slew of young players with minimal pro experience.