.Source: 49ers possess Aiyuk field platform along with Browns, Patriots NBC Athletics Bay AreaBrandon Aiyuk business demand: 49ers WR more probable to become dealt than receive extension coming from San Francisco, every report CBS SportsReport: 49ers possess structure in position for Brandon Aiyuk trade with two teams San Francisco ChronicleReport: 49ers have worked out platforms of Brandon Aiyuk trades with Browns, Patriots 49ers Webzone49ers insider provides most current update on Aiyuk as trade reports swirl Yahoo Sports.