Spencer Nealy has been suspended for the first four games of the 2014 NFL season for breaching the league's rules on drugs.
The announcement confirmed that the Minnesota Vikings defensive lineman violated the policy on performance-enhancing substances.
The 24-year-old will be eligible to take part in practices and off-season activities as well as pre-season games, but will not be able to join the active roster until September 29.
Nealy has taken responsibility for the suspension, stating that he took a supplement which contained a banned stimulant.
