.Resource: 49ers have Aiyuk business platform with Browns, Patriots NBC Sports Bay AreaBrandon Aiyuk field demand: 49ers WR more probable to be dealt than get extension from San Francisco, per report CBS SportsReport: 49ers possess framework in place for Brandon Aiyuk patronize pair of crews San Francisco ChronicleReport: 49ers have exercised frameworks of Brandon Aiyuk trades with Browns, Patriots 49ers Webzone49ers insider gives newest upgrade on Aiyuk as trade rumors swirl Yahoo Athletics.