.Source: 49ers have Aiyuk business structure along with Browns, Patriots NBC Athletics Bay AreaBrandon Aiyuk trade need: 49ers WR most likely to be dealt than receive extension from San Francisco, per file CBS SportsReport: 49ers possess framework in place for Brandon Aiyuk trade with two teams San Francisco ChronicleReport: 49ers have exercised structures of Brandon Aiyuk trades with Browns, Patriots 49ers Webzone49ers insider offers latest upgrade on Aiyuk as business rumors swirl Yahoo Sports.