.Resource: 49ers possess Aiyuk trade framework with Browns, Patriots NBC Athletics Bay AreaBrandon Aiyuk field need: 49ers WR most likely to become handled than get expansion from San Francisco, per document CBS SportsReport: 49ers possess platform in place for Brandon Aiyuk patronize two staffs San Francisco ChronicleReport: 49ers have exercised structures of Brandon Aiyuk trades with Browns, Patriots 49ers Webzone49ers insider provides newest update on Aiyuk as field stories swirl Yahoo Athletics.