Buffalo Bills running back Karlos Williams has been suspended for the first four games of the season for violating the NFL's substance abuse policy, the league announced Friday.
"As an organization, we are disappointed that Karlos has put himself in this situation," the Bills said in a statement. "Poor decisions such as this affect not only the individual, but the entire Bills organization. We will continue to work with Karlos through the various player programs we provide to assist him in making better decisions moving forward."
Williams rushed for 517 yards and 7 touchdowns as a rookie last season.