D.K. Metcalf shared his experience as a first-year wide receiver for the Seattle Seahawks with 547 players in the NFL’s first rookie webinar after the draft last month. Jacksonville Jaguars quarterback Gardner Minshew and San Francisco 49ers linebacker Azeez Al-Shaair also were panelists on the discussion moderated by Mo Kelly, a former Seahawks defensive back and the team’s current director of player engagement.  Tracy Perlman, the NFL senior vice president of football communications and marketing, said two questions rookies asked most were on social media use and best way to assimilate themselves into a locker room.