NFL can't ignore reignited grass. vs. turf field debate gaining steam
San Francisco 49ers Announce Global Syn-Turf as Official Artificial Turf Partner
Analyzing NFL Injury Frequency on Grass vs. Turf Fields
90 years of football at Hughes Stadium
49ers' Deebo Samuel a 'firm believer' in grass over turf in NFL
NFL Broadcaster Calls Bill Belichick's QB Mismanagement Garbage - Sactown Sports
Much-maligned field at Levi's Stadium gets Super Bowl makeover
I feel rich': Troy Taylor has transformed Sac State into an FCS power
49ers' George Kittle, Nick Bosa join NFL Twitter in calling for safer fields – NBC Sports Bay Area & California
San Francisco 49ers' turf wars continue in new Levi's Stadium - Sports Illustrated