.Source: 49ers possess Aiyuk business framework with Browns, Patriots NBC Sports Bay AreaBrandon Aiyuk trade demand: 49ers WR more probable to become worked than receive extension from San Francisco, every document CBS SportsReport: 49ers have framework in location for Brandon Aiyuk patronize two teams San Francisco ChronicleReport: 49ers have worked out frameworks of Brandon Aiyuk trades with Browns, Patriots 49ers Webzone49ers insider provides most current update on Aiyuk as profession reports swirl Yahoo Sports.