ESPNCleveland.com reported a month ago that Haden was notified of the suspension after he tested positive for the prescription drug Adderall during a routine test in the offseason.
Rap Sheet Rundown: Week 1
Browns president Mike Holmgren confirmed as much last week, saying the team still was waiting to hear back from the NFL after Haden's appeal.
The league now was spoken. Haden's suspension begins immediately.