.Resource: 49ers have Aiyuk trade platform with Browns, Patriots NBC Athletics Bay AreaBrandon Aiyuk field requirement: 49ers WR very likely to become worked than receive expansion coming from San Francisco, every record CBS SportsReport: 49ers have platform in place for Brandon Aiyuk trade with two teams San Francisco ChronicleReport: 49ers have actually worked out platforms of Brandon Aiyuk patronizes Browns, Patriots 49ers Webzone49ers expert offers newest update on Aiyuk as business rumors swirl Yahoo Athletics.