Costly upkeep, less-than-ideal weather lead most college football stadiums to use artificial turf – News-Herald
NFL Players Association says Paycor's field is unsafe for athletes
NFL artificial turf vs. grass debate: League, NFLPA spar about stadium playing surfaces after Aaron Rodgers injury
A History of the NFL in 95 Objects: Artificial Turf - Sports Illustrated
More stadiums going to artificial turf
Why Is the NFL Still Playing On Turf?, by Christian Behler
NFL players slam use of artificial turf in wake of Aaron Rodgers' season-ending injury: 'Profit over people'
Turf Tech: The High Science of the Lowest Part of the Game
Field of green: Wellpinit debuts new artificial turf football field made possible through NFL grant
ARE artificial-turf fields unsafe for athletes? – Orange County Register
The History of Turf: AstroTurf, Omniturf, Modern NFL Health Risks
NFL Players Union Boss Wants Natural Grass After Rodgers Injury
NFL Turf Controversy Grows With Union Push For Grass Fields
Artificial turf raises concerns about equity and injuries – The Ithacan
NFL players union renews call for grass fields after Aaron Rodgers' injury