USC basketball coach Frank Martin is dealing with doctors a lot more than he expected to be these days. He has been scheduled for knee replacement surgery Thursday for sometime. Complicating things for him, he tested positive for Covid-19 a few weeks ago. He has recovered and has twice tested negative, and no one is his family has tested positive. Tuesday afternoon Martin discussed his health, the social unrest in the country, AJ Lawson’s future and his search for a new assistant coach, among other things, with media members in a Zoom conference call.