NFL filing grievance against NFLPA claiming it advised players to feign injury for contract leverage
NFLPA will file an official grievance against Panthers for field conditions in Lions' loss
NFLPA filing grievance against Panthers for playing surface in Week 16
NFLPA filing grievance against Panthers for playing surface in Week 16
NFLPA alleges league forced Lions, Panthers to play in knowingly unsafe conditions - Pride Of Detroit
Source - NFLPA filing grievance over hardness of Panthers' turf - ESPN
Why can't the NFL agree on one surface? Everything to know about turf vs. grass - ESPN
NFL filing grievance against NFLPA claiming it advised players to feign injury for contract leverage
The MLS Stadium Thread, Page 252
NFL Week 15 Fantasy Football Recap: Carolina Panthers vs. Pittsburgh Steelers, Fantasy Football News, Rankings and Projections
NFLPA says new data shows turf fields still cause more injuries than natural surfaces
After Lions trash field in Carolina, NFLPA files grievance against NFL, Panthers