.Source: 49ers have Aiyuk trade platform with Browns, Patriots NBC Sports Bay AreaBrandon Aiyuk trade requirement: 49ers WR more likely to be dealt than receive extension coming from San Francisco, per record CBS SportsReport: 49ers have framework in position for Brandon Aiyuk patronize pair of teams San Francisco ChronicleReport: 49ers have exercised frameworks of Brandon Aiyuk patronizes Browns, Patriots 49ers Webzone49ers insider provides most up-to-date update on Aiyuk as field reports swirl Yahoo Sports.