Chicago: The president of the NFL Players Association blasted the conditions at Soldier Field on Saturday, and he didn’t exactly get an argument from the Chicago Bears or Kansas City Chiefs after their preseason game.

Union president JC Tretter tweeted the field was not up to NFL standards.

“The NFL said that this field met minimum testing standards,” he wrote. “We clearly need to re-evaluate what is an acceptable surface for players to compete on. We need new testing metrics looking at the performance and safety of every field. The NFL can and should do better.”