NFL players overwhelmingly prefer natural grass, citing comfort and player-safety concerns, even as the league maintains that recent injury data show no significant difference between grass and artificial turf. The NFL and NFLPA are moving toward stricter performance-based standards for all surfaces, while Buffalo’s new Highmark Stadium illustrates the challenge: its grass field met league compliance requirements but developed significant divots and had to be replaced before the regular-season opener. NFL field director Nick Pappas says the goal is consistency and performance rather than simply choosing grass or turf. He spoke to Bloomberg's Carol Massar, Tim Stenovec, and Randall Williams.