The Baltimore Ravens say they are designating Lamar Jackson as their franchise player. That prevents him from becoming an unrestricted free agent this month after the expiration of his rookie contract. The nonexclusive franchise tag means Jackson can negotiate with other teams, but the Ravens would have a chance to match any agreement. If they choose not to match, they’d receive two first-round draft picks in return. If Jackson plays this season on the franchise tag, he’d make $32.4 million. Jackson becoming available could shake up NFL free agency, which opens later this month.