.Resource: 49ers have Aiyuk field structure with Browns, Patriots NBC Athletics Bay AreaBrandon Aiyuk profession demand: 49ers WR more likely to be worked than obtain expansion from San Francisco, per record CBS SportsReport: 49ers possess framework in place for Brandon Aiyuk patronize pair of groups San Francisco ChronicleReport: 49ers have actually worked out structures of Brandon Aiyuk trades with Browns, Patriots 49ers Webzone49ers insider offers latest improve on Aiyuk as trade reports swirl Yahoo Athletics.