.Source: 49ers have Aiyuk field structure along with Browns, Patriots NBC Sports Bay AreaBrandon Aiyuk trade demand: 49ers WR most likely to be handled than get extension coming from San Francisco, every record CBS SportsReport: 49ers have structure in location for Brandon Aiyuk patronize two teams San Francisco ChronicleReport: 49ers have worked out structures of Brandon Aiyuk trades with Browns, Patriots 49ers Webzone49ers insider gives most recent improve on Aiyuk as business rumors swirl Yahoo Sports.