NFL hopes to reduce head injuries with helmet experiment


              Carolina Panthers' Xavier Woods watches during NFL football team's training camp wearing his helmet with a protective covering at Wofford College on Wednesday, Aug. 3, 2022, in Spartanburg, S.C. The NFL has made the use of Guardian Caps mandatory up until the second week of the preseason for offensive and defensive lineman, linebackers and tight ends. (AP Photo/Chris Carlson)
            
              Carolina Panthers' Wyatt Miller arrives for the NFL football team's training camp wearing his helmet with a protective covering at Wofford College on Tuesday, Aug. 2, 2022, in Spartanburg, S.C. The NFL has made the use of Guardian Caps mandatory up until the second week of the preseason for offensive and defensive lineman, linebackers and tight ends. (AP Photo/Chris Carlson)
            
              Carolina Panthers' Darryl Johnsonarrives for the NFL football team's training camp carrying his helmet with a protective covering at Wofford College on Wednesday, Aug. 3, 2022, in Spartanburg, S.C. The NFL has made the use of Guardian Caps mandatory up until the second week of the preseason for offensive and defensive lineman, linebackers and tight ends. (AP Photo/Chris Carlson)
            
              Carolina Panthers' Xavier Woods practices during the NFL football team's training camp at Wofford College on Tuesday, Aug. 2, 2022, in Spartanburg, S.C. (AP Photo/Chris Carlson)
            
              Philadelphia Eagles' Jason Kelce watches a drill during training camp at the NFL football team's practice facility, Friday, July 29, 2022, in Philadelphia. (AP Photo/Matt Slocum)
            
              Philadelphia Eagles' Jason Kelce walks the field during training camp at the NFL football team's practice facility, Friday, July 29, 2022, in Philadelphia. (AP Photo/Matt Slocum)
            
              Chicago Bears offensive line Michael Schofield, left, works with offensive line Doug Kramer at the NFL football team's training camp, Thursday, July 28, 2022, in Lake Forest, Ill. (AP Photo/Nam Y. Huh)
            
              Washington Commanders running back J.D. McKissic, right, runs wearing a Guardian Cap football helmet during practice at the team's NFL football training facility, Wednesday, July 27, 2022 in Ashburn, Va. (AP Photo/Alex Brandon)
            
              Washington Commanders running back Brian Robinson, second from left, wears a Guardian cap football helmet during practice at the team's NFL football training facility, Wednesday, July 27, 2022 in Ashburn, Va. (AP Photo/Alex Brandon)
            
              Carolina Panthers tackle Ikem Ekwonu (79) high-fives defensive end Brian Burns (53) at the NFL football team's training camp at Wofford College in Spartanburg, S.C., Thursday, July 28, 2022. (AP Photo/Nell Redmond)
            
              Carolina Panthers tackle Wyatt Miller warms up at the NFL football team's training camp at Wofford College in Spartanburg, S.C., Thursday, July 28, 2022. (AP Photo/Nell Redmond)
            
              Cleveland Browns helmets, with Guardian Caps, hang from a rack during the NFL football team's training camp, Thursday, July 28, 2022, in Berea, Ohio. (AP Photo/Nick Cammett)
            
              Washington Commanders running back Jonathan Williams wears a Guardian Cap football helmet during practice at the team's NFL football training facility, Wednesday, July 27, 2022 in Ashburn, Va. (AP Photo/Alex Brandon)
NFL hopes to reduce head injuries with helmet experiment