Sources: NFLPA backs 49ers' criticism of MetLife Stadium field, pushes for review of field turf Yahoo Sports49ers coach Kyle Shanahan on injuries, a sticky field, players stepping up Sacramento BeeGritty Jimmy's Leadership Steers 49ers Through Disaster 49ers Webzone49ers Confirm Season-Ending ACL Injury for Nick Bosa 49ers.comSan Francisco 49ers: Coaches, players upset with MetLife stadium turf Niners NationView Full Coverage on Google News