FILE - In this Sept. 2, 2016, file photo, workers walk along the grandstands in the rain at Darlington Raceway after weather forced NASCAR to call off qualifying for the Sprint Cup and XFinity series auto races. NASCAR says it will resume its season without fans present starting May 17 at Darlington Raceway in South Carolina. (AP Photo/Terry Renna, File)

FILE - In this March 26, 2020, file photo, Jason Hackedorn looks into Progressive Field, home of the Cleveland Indians baseball team, in Cleveland. With the distinct possibility of pro sports resuming in empty venues, a recent poll suggests a majority of U.S. fans wouldn't feel safe attending games anyway without a coronavirus vaccine.(AP Photo/Tony Dejak, File)