The Oakland Raiders cut practice short by 30 minutes on Wednesday due to poor air quality.
The wildfires ravaging California made it hard for players to breathe.
"You definitely could smell it," Jalen Richard said. "We'll see. They asked us about how we feel."
Many high school and youth sporting events have been canceled because of fears about smoke inhalation in the area. Fires in California have burned 170,000 acres and killed 23 people this week.