49ers news: Levi's Stadium look like with no fans in attendance?
Did 49ers leave their Super Bowl hopes on the field in New Jersey
Artificial turf vs. real grass: NFL's ongoing problem with playing
Chicago Bears installing new turf at Soldier Field ahead of season
NFL players and owners are at odds over surfaces their teams play on
A cure for what's ailing the 49ers? Levi's Stadium's friendly
When does every NFL team play their best?
Rodgers, NFL players urge league to nix turf, go with grass
Football and Artificial Grass
Bears penalized for using towel on soggy field before FG try