Urban Meyer is shutting down shocking allegations made by one of his former Ohio State players ... who claimed the coach used a photo of Trayvon Martin to implement a "no hoodies" rule -- but the ex-coach says it's absolutely NOT true.
Marcus Williamson -- who played CB for the Buckeyes from 2017 to 2021 -- relayed the shocking story on Twitter, calling out Meyers in the process.
"My first team meeting.