Rob Gronkowski revealed in an interview that he had “liquid” in his brain due to the punishment he endured during his NFL career.
“No lie, I felt my head, I used to have liquid,” Gronkowski said, reported Bleacher Report. “It used to be thick, like, my head used to be thicker—a centimeter of liquid in some spots. And you'd be like, what the heck? You could put indents in my head.”