Former NFL star says he 'would definitely be' frustrated with NFL letting FIFA bring grass to turf fields

NFL players have asked for years to make grass fields mandatory at their stadiums -- this summer, they are, but for another reason. Seven NFL stadiums that use artificial turf have transformed their playing surfaces to grass for FIFA regulations during the World Cup. Half the league’s stadiums use turf, despite NFLPA Executive Director Lloyd Howell saying that 92% of the league’s players prefer grass. CLICK HERE FOR MORE SPORTS COVERAGE ON FOXNEWS.COM Understandably so, Super Bowl champion offen