What is NFL Turf Made of? - Turf Factory
NFLPA calls for 'moving all stadium fields' to natural grass in wake of Aaron Rodgers' season-ending injury
A History of the NFL in 95 Objects: Artificial Turf - Sports Illustrated
NFL players rip league over artificial turf after Aaron Rodgers' season-ending injury: 'Profit over people'
List of NFL Stadiums With Grass or Turf
NFL Players Association calls on NFL to switch all fields to natural grass
NFLPA leader calls for natural grass in all NFL stadiums - Newsday
NFL Grass vs. Turf: Which One Is the Best? - Turf Factory
Lawn care brand urges NFL to switch all fields to grass
NFL players urge league to nix turf, go with grass - The Iola Register
NFL data shows recent injury rates same on grass, artificial turf - ESPN
What Is the Function of Rubber Pellets in Synthetic Turf?
NFLPA renews call for natural grass to help prevent injuries after Rodgers gets hurt
Turf versus grass: Local doctor weighs in on which is better for athletes