There is no profession in sports like the NFL tight end. None. You must mash 320-pound defensive ends in the run game. You must twist your torso at impossible angles to make acrobatic catches downfield in the pass game. You must have a certain element of crazy to you, too. The tight end is a blend of brain and brawn and bruises…so many bruises. BLOOD AND GUTS tracks the fascinating rise of this position one tight end at a time, from Mike Ditka and John Mackey in the ’60s to Rob Gronkowski today. As much as football has changed over the years, there has always been one glorious constant: the tight end.