.Source: 49ers have Aiyuk trade framework with Browns, Patriots NBC Athletics Bay AreaBrandon Aiyuk trade demand: 49ers WR more likely to become handled than receive expansion coming from San Francisco, per report CBS SportsReport: 49ers possess framework in location for Brandon Aiyuk trade with 2 staffs San Francisco ChronicleReport: 49ers have exercised platforms of Brandon Aiyuk patronizes Browns, Patriots 49ers Webzone49ers insider offers newest improve on Aiyuk as field rumors swirl Yahoo Athletics.