Turf or grass football field? Aaron Rodgers' injury sparks debate
NFL History: 100 objects that tell the story of football - Sports
NFL History: 100 objects that tell the story of football - Sports
Caller-Times General Excellence: Jan. 15, 2012 by Allison Ehrlich
NFL players urge league to nix turf, go with grass - The Iola Register
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NFL artificial turf vs. grass debate: League, NFLPA spar about
Turf or grass football field? Aaron Rodgers' injury sparks debate
As Aaron Rodgers' injury resurfaces grass vs. turf debate, NFL's
Aaron Rodgers Jabs NFL Regarding Artificial Turf, Player Safety
After Aaron Rodgers injury, NFLPA calls for grass in all stadiums