.Resource: 49ers have Aiyuk business structure along with Browns, Patriots NBC Athletics Bay AreaBrandon Aiyuk profession need: 49ers WR more likely to be worked than get extension coming from San Francisco, per record CBS SportsReport: 49ers have structure in position for Brandon Aiyuk trade with two staffs San Francisco ChronicleReport: 49ers have worked out frameworks of Brandon Aiyuk trades with Browns, Patriots 49ers Webzone49ers insider gives most current update on Aiyuk as field stories swirl Yahoo Sports.