.Source: 49ers have Aiyuk profession structure with Browns, Patriots NBC Sports Bay AreaBrandon Aiyuk trade requirement: 49ers WR most likely to be worked than receive extension coming from San Francisco, every document CBS SportsReport: 49ers possess platform in location for Brandon Aiyuk trade with 2 groups San Francisco ChronicleReport: 49ers have exercised platforms of Brandon Aiyuk trades with Browns, Patriots 49ers Webzone49ers expert provides most recent update on Aiyuk as business reports swirl Yahoo Athletics.