Yahoo Sports reports: The Santa Clara County District Attorney's Office has issued an arrest warrant for San Francisco 49ers receiver Brandon Aiyuk on a misdemeanor charge of exhibition of speeding. District attorney's spokesman Sean Webby confirmed Wednesday that the warrant has been issued in response to a video Aiyuk posted to social media last December that appeared to show him speeding on the road in front of Levi's Stadium. The California Post first reported the arrest warrant.