An Oklahoma State University football player says he has tested positive for COVID-19 after attending demonstrations protesting the police killing of George Floyd. Amen Ogbongbemiga, a senior linebacker, tweeted Tuesday that he had tested positive for the virus after attending protests in Tulsa. "After attending a protest in Tulsa AND being well protective of myself, I have tested positive for COVID-19," he tweeted. "Please, if you are going to protest, take care of yourself and stay safe." Ogbongbemiga, a second-team All-Big 12 selection last year, returned to campus on Monday and will be quarantined in separate on-campus housing, according to...