Tony Avelar/Associated Press
After bobbing and weaving around the coronavirus pandemic for much of the fall, the N.F.L. nears the end of the third quarter of its regular season facing crises on teams from coast to coast.
On Saturday, health officials in Santa Clara County threw the San Francisco 49ers’ season into turmoil when they temporarily banned all contact sports at the high school, college and professional levels and required anyone traveling into the region from more than 150 miles away to quarantine starting at 12:01 a.m. Monday. The order would be in effect until at least Dec.