LA Galaxy have released Serbian winger Aleksandar Katai after a series of "racist and violent" social media posts by his wife.
In Instagram posts that have since been deleted, Tea Katai referred to Black Lives Matter protesters as "disgusting cattle".
She also urged violence against them, according to media reports.
Black Lives Matter supporters have protested in cities across the US and the wider world since the death of George Floyd.
The 46-year-old was an unarmed black man killed when officer Derek Chauvin knelt on his neck for more than eight minutes while restraining him.