Silver said Brown has participated in offseason workouts with Seahawks backup quarterback Geno Smith. Brown also is the cousin of Ravens receiver Marquise Brown.
Earlier this month, Brown pleaded no contest to burglary and battery charges from a January incident in Florida.
The Patriots released Brown after he played one game last season because of allegations of sexual assault and rape made by a woman whom Brown also allegedly threatened via text messages. The NFL is investigating those allegations.
He spent the 2019 offseason with the Raiders, where he convinced the team to release him after a string of bizarre incidents.
Brown played nine seasons with the Steelers, earning seven Pro Bowl and four first-team All-Pro selections. His 11,207 yards are second-most in franchise history (Hines Ward, 12,083) as are his 74 receiving touchdowns (Ward, 85).