NFL Network's Ian Rapoport reports that the suspension is for violating the NFL's substance abuse policy. Sanders was previously suspended for the first four games of the 2014 season for violating the policy.
The Jacksonville Jaguars released Sanders last month after two seasons with the team.
As a rookie in 2013, the 23-year-old caught 51 passes for 484 yards and one touchdown in 15 games. Last season, the 5'7" Sanders recorded only six catches for 55 yards.
After Sanders was released, the National Football Post reported that the Seattle Seahawks, Detroit Lions and Miami Dolphins were all interested in the receiver. He remains unsigned as training camps open around the NFL last week and this week.
- Molly Geary