Possible departures: There’s nothing imminent here, but massive change could arrive soon. Marshal Yanda, 34, was among the NFL’s best right guards in 2018 but hasn’t committed to returning for another NFL season. Guard Alex Lewis, entering the final year on his rookie contract, has battled injuries and inconsistency. Matt Skura, an exclusive-rights free agent whom the Ravens can tender a league-minimum contract, is not the prototypical center for offensive coordinator Greg Roman’s running schemes. And guard-tackle James Hurst, while signed through 2021, is coming off maybe his worst game as a starter.