.Source: 49ers possess Aiyuk field structure with Browns, Patriots NBC Athletics Bay AreaBrandon Aiyuk trade need: 49ers WR more probable to become worked than acquire extension coming from San Francisco, every file CBS SportsReport: 49ers have framework in location for Brandon Aiyuk trade with two crews San Francisco ChronicleReport: 49ers have actually exercised structures of Brandon Aiyuk patronizes Browns, Patriots 49ers Webzone49ers expert gives newest update on Aiyuk as business stories swirl Yahoo Sports.