Give author @MattZemek a twitter follow and check out his musings on college sports at https://www.patreon.com/Zemek. QUESTION: Should Miami fans already be concerned about Manny Diaz? Our story on Miami and Manny Diaz starts with the Oklahoma Sooners. Trust me — I know what I’m doing here. Oklahoma started the 2019 season with a sharp, focused defense. New …