San Francisco 49ers wide receiver Brandon Aiyuk has formally requested a trade after failed contract negotiations for a lucrative extension. Despite interest from other teams, the 49ers remain adamant about keeping Aiyuk. The rising cost of receiver contracts complicates the situation for San Francisco, as Aiyuk seeks a deal in line with recent big-money contracts. The team has a history of handling trade requests from players seeking lucrative extensions, such as wideout Deebo Samuel Sr. and kicker Robbie Gould. Aiyuk's breakout season has put him in a strong negotiating position, but his future with the team remains uncertain. The 49ers have a track record of signing key players to extensions, but Aiyuk's situation may require further patience and negotiation. If unresolved, Aiyuk may miss training camp as he waits for a resolution to his contract dispute.