.Source: 49ers possess Aiyuk trade framework along with Browns, Patriots NBC Sports Bay AreaBrandon Aiyuk business demand: 49ers WR more likely to become worked than get expansion from San Francisco, per document CBS SportsReport: 49ers have framework in place for Brandon Aiyuk trade with pair of crews San Francisco ChronicleReport: 49ers have worked out frameworks of Brandon Aiyuk patronizes Browns, Patriots 49ers Webzone49ers expert provides most recent update on Aiyuk as trade reports swirl Yahoo Sports.