Brandon Aiyuk criticized the 49ers after claiming the team voided $30 million in guaranteed money while keeping him under contract. San Francisco 49ers wide receiver Brandon Aiyuk continues to air his frustrations with the organization as his contract dispute shows no signs of ending. “Players sacrifice their health and career to secure long term contracts that guarantee compensation,” Aiyuk wrote before questioning the definition of a guaranteed contract. “How can a team void the $ that is ‘guaranteed' and agreed upon yet still have contractual control? “49ers voided $30m dollars in guaranteed Bonus money that should have been paid out to me already.