.Source: 49ers have Aiyuk field framework along with Browns, Patriots NBC Athletics Bay AreaBrandon Aiyuk trade demand: 49ers WR very likely to be dealt than acquire extension from San Francisco, every report CBS SportsReport: 49ers have framework in place for Brandon Aiyuk patronize 2 groups San Francisco ChronicleReport: 49ers have actually worked out platforms of Brandon Aiyuk trades with Browns, Patriots 49ers Webzone49ers expert offers latest update on Aiyuk as business stories swirl Yahoo Athletics.