Philadelphia Eagles head coach Doug Pederson tests positive for Covid-19 - CNN

Myron Rolle, a third-year neurosurgeon resident at Massachusetts General Hospital and former NFL safety for the Pittsburgh Steelers and Tennessee Titans, told CNN more time is needed before players, teams or fans return to stadiums.

"I do not think it's safe to return right now," Rolle said.

Major League Baseball Commissioner Rob Manfred threatened to shut down the shortened season Friday if the league and players don't do a better job of following Covid-19 protocols and managing the virus.