.Resource: 49ers possess Aiyuk trade structure with Browns, Patriots NBC Sports Bay AreaBrandon Aiyuk field requirement: 49ers WR very likely to become dealt than acquire expansion from San Francisco, every document CBS SportsReport: 49ers possess framework in position for Brandon Aiyuk trade with two groups San Francisco ChronicleReport: 49ers have exercised platforms of Brandon Aiyuk trades with Browns, Patriots 49ers Webzone49ers insider gives latest update on Aiyuk as field rumors swirl Yahoo Sports.