Stallworth served a one-year suspension following a DUI manslaughter case in Florida that resulted in the death of 59-year-old Mario Reyes. Stallworth also served 24 days in jail this past summer.
The Browns signed Stallworth to a $35 million contract in 2008. That year he recorded 17 receptions for 170 yards in 11 games. The release officially makes Stallworth an unrestricted free agent.