Bryant missed the entire 2016 season with the Steelers after repeated violations of the substance-abuse policy.
In 2017, he had 50 catches for 603 yards and three touchdowns. He was outwardly unhappy with his role in the offense and was benched for a game against the Lions after calling out rookie JuJu Smith-Schuster on social media.
Bryant will be a free agent after the 2018 season.
Any suspension could be for a year or longer for Bryant. On April 27, he said during a news conference that he embraced a “clean slate and fresh start” in Oakland, citing a desire to have a long-term future with the Raiders.