NFL Players Association president calls for grass surfaces to be used, NFL News
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NFLPA leader calls for natural grass in all NFL stadiums - Newsday
NFLPA Calls for Elimination of Artificial Turf Fields to Avoid 'Unnecessary Injuries', News, Scores, Highlights, Stats, and Rumors
Field of dreams? NFLPA calls for Giants, Jets to convert MetLife Stadium from turf to natural grass
Why are NFL players pushing the league to switch to grass fields?