According to Ian Rapoport, the Jaguars are promoting WR Jaydon Mickens from their practice squad to the active roster.
Mickens, 23, wound up signing on with the Raiders as an undrafted free agent out of Washington back in May of last year. He was waived at the start of the season and spent his rookie year on their practice squad before returning to the team on a future/reserve contract this past January.
The Raiders waived him with an injury designation coming out of the preseason and eventually cut him loose with an injury settlement.