Wearing the newly-mandated “guardian caps” over their helmets, Chicago Bears offensive line Michael Schofield, left, works with offensive line Doug Kramer at the NFL football team’s training camp last Thursday in Lake Forest, Ill. The experimental absorbent padding is aimed to try to reduce traumatic brain injuries. (AP PHOTO/NAM Y. HUH)
BY STEVE REED AP Sports Writer The mushroom-like contraptions NFL players are wearing on their helmets during training camp may look strange, but they’re a…