Aaron Rodgers' injury prompts renewed call for NFL grass over turf
NFL Players Association calls on 6 venues, including Indy's, to
NFLPA calls on 6 venues to improve playing surfaces
Longing for NFL games on grass fields in Southern California - The
Rodgers, NFL players urge league to nix turf, go with grass
Artificial turf vs. real grass: NFL's ongoing problem with playing
NFL Players Association Challenges National-Anthem Policy - WSJ
NFLPA: League must invest in grass playing surfaces
Lions changing Ford Field turf to 'safer' core monofilament
NFLPA calls on six venues to improve playing surfaces
NFLPA head says fields much better, still can be improved – The