.Source: 49ers have Aiyuk business platform with Browns, Patriots NBC Sports Bay AreaBrandon Aiyuk trade need: 49ers WR more probable to be worked than receive extension coming from San Francisco, every document CBS SportsReport: 49ers have framework in location for Brandon Aiyuk trade with pair of groups San Francisco ChronicleReport: 49ers have exercised platforms of Brandon Aiyuk trades with Browns, Patriots 49ers Webzone49ers insider offers most up-to-date update on Aiyuk as trade stories swirl Yahoo Athletics.