NFL players and owners are at odds over surfaces their teams play on
Jimmy Garoppolo urges NFL to copy Premier League and make conditions better for players - Mirror Online
49ers Photos San Francisco 49ers –
How foot and ankle injury trends reflect today's NFL
MetLife Stadium turf controversy: NFL deems playing surface safe after it's called 'trash' by one 49ers player
A cure for what's ailing the 49ers? Levi's Stadium's friendly, real grass
49ers news: 5 in-house options to replace Alex Mack - Niners Nation
49ers replacing Levi's Stadium turf already
Injury-Ravaged San Francisco 49ers Question Safety Of MetLife Stadium Artificial Turf - CBS San Francisco
Cowboys to Use Training Camp Bubble in World-Class Facilities ✭ Inside The Star