According to Caplan, Brown signed a one-year deal.
ESPN NFL Nation beat writer Bill Williamson reports that Brown already has a locker in the team’s practice facility.
Brown was surprisingly waived/injured by the Chargers' during final roster cut downs. Brown suffered a calf strain on the second day of training camp, but was expected to return to the field early in the regular season.
However, general manager Tom Telesco said the organization liked the depth they had at receiver, and decided to go in a different direction.
Brown, 25, played all 16 games for the first time in his NFL career in 2013, finishing with 41 receptions for 472 yards and a touchdown. Brown had only one drop on the year.
The Chargers play the Raiders for the first time this season on Oct. 12 in Oakland.