By Daniel Chavkin Lions quarterback Jared Goff criticized the field conditions last week. View the original article to see embedded media. The NFLPA is filing a grievance against the NFL and the Panthers over the field conditions for last weekend’s game at Bank of America Stadium against the Lions, ESPN’s Adam Schefter reports. The union reportedly criticized the field conditions before the game began, and it only got worse throughout the day. The game was the coldest ever on record for a Panthers home game, with the temperature in the mid-20s at kickoff. It was the first time ever that an NFL…