FILE - In this Jan. 11, 2020, file photo, Kansas City Royals' Salvador Perez takes a photograph with a fan's cellphone prior to an All-Star exhibition softball game at Rod Carew stadium in Panama City, Panama. When the virus wanes enough to allow the games to begin again, the very essence of these events will likely be missing. “You know how much I love to talk to the fans, you know? To be in conversation, to throw the ball to kids,” Kansas City Royals catcher Salvador Perez said. (AP Photo/Eric Batista, File)

FILE - In this Dec. 1, 2017, file photo, St. Louis Blues' Joel Edmundson pauses as fans use their phones to light up Scottrade Center during a ceremony as part of a league-wide cancer awareness campaign, before an NHL hockey game between the St. Louis Blues and the Los Angeles Kings in St. Louis. When the virus wanes enough to allow the games to begin again, the very essence of these events will likely be missing. Playing in empty buildings would require a significant recalibration. (AP Photo/Jeff Roberson, File)

FILE - In this Nov. 5, 2016, file photo, Mississippi tight end Evan Engram greets fans during the Walk of Champions in the Grove before an NCAA college football game between Mississippi and Georgia Southern in Oxford, Miss. When the virus wanes enough to allow the games to begin again, the very essence of these events will likely be missing. (AP Photo/Thomas Graning, File)

FILE - In this Jan. 28, 2012, file photo, Colorado State guard Kaipo Sabas (15) if elevated above a crowd of students who rushed the court after a 77-60 victory over No. 13 San Diego State in an NCAA basketball game, in Fort Collins Colo. When the virus wanes enough to allow the games to begin again, the very essence of these events will likely be missing. (AP Photo/Barry Gutierrez, File)

FILE - In this April 13, 2016, file photo, a Tampa Bay Lightning fan wearing an astronaut suit taunts Detroit Red Wings defenseman Alexei Marchenko (47), of Russia, during the third period of Game 1 in a first-round NHL hockey Stanley Cup playoff series in Tampa, Fla. The roar of the crowd has been a staple of major sports. Playing in empty buildings would require a significant recalibration. (AP Photo/Chris O'Meara, File)

FILE - In this Feb. 20, 2008, file photo, Nebraska's Cookie Miller (24) body surfs the crowd that rushed the court after Nebraska beat Kansas State 71-64 in a college basketball game in Lincoln, Neb. When the virus wanes enough to allow the games to begin again, the very essence of these events will likely be missing. Playing in empty buildings would require a significant recalibration.(AP Photo/Dave Weaver, FIle)

FILE - In this May 30, 2016, file photo, fans cheer as Golden State Warriors guard Stephen Curry yells after the Warriors beat the Oklahoma City Thunder in Game 7 of the NBA basketball Western Conference finals in Oakland, Calif. The roar of the crowd has been a staple of major sports and an advantage for the home team. Playing in empty buildings would require a significant recalibration. (AP Photo/Ben Margot, File)