The NFL has no plans to move into a bubble as it takes several new steps to combat the spread of the coronavirus. The league will begin PCR testing for COVID-19 on game days starting this week, use of masks in walkthroughs are now mandatory and only play-callers will be permitted to wear face shields in lieu of masks or gaiters on the sideline. … The updated protocols sent to teams Monday night also require anyone identified as a “high risk” close contact to be isolated and not permitted to return to the team’s facility for at least five days.