Will Hill has been handed a four-game suspension for breaching the NFL's policy on substances of abuse.
It is the second time that the New York Giants safety has been caught violating the league's drug laws since joining the team last year.
The 23-year-old claimed that his previous suspension was down due to using Adderall, which is used to control ADHD.
Hill will be eligible to return to the Giants' active roster on September 30 following their week four game against the Kansas City Chiefs.