.Source: 49ers have Aiyuk field platform along with Browns, Patriots NBC Sports Bay AreaBrandon Aiyuk business demand: 49ers WR more likely to be dealt than receive expansion coming from San Francisco, every record CBS SportsReport: 49ers have platform in position for Brandon Aiyuk trade with pair of crews San Francisco ChronicleReport: 49ers have exercised platforms of Brandon Aiyuk trades with Browns, Patriots 49ers Webzone49ers expert gives most recent improve on Aiyuk as field rumors swirl Yahoo Athletics.