Read this excerpt from "heads up on sports safety." before modern helmets, in 1904, the chicago tribune reported 18 football deaths and 159 serious injuries—in that one year alone. because the game was lawless and lacking in safety equipment, football was a brutal, deadly sport. if you play contact sports, you know that a collision with an opposing player can hurt. imagine a running back in a football game. one minute he’s sprinting across the field with football in tow, the next second his head is being rammed by a player weighing 335 pounds, unleashing up to 1700 pounds of force. what phrase shows that the author is using chronology? before modern helmets, in 1904 reported 18 football deaths and 159 serious injuries if you play contact sports unleashing up to 1700 pounds of force