https://www.vice.com/en_us/article/k7qnvn/virtual-fans-are-coming-to-major-league-baseball

Fox Sports announced today that it will introduce virtual fans to its live broadcasts of Major League Baseball starting this Saturday. 

In a teaser video posted by the network, an empty stadium can be seen being populated with thousands of Sim-like virtual fans dressed in different team colors. The virtual fans can be heard cheering, booing, and can even be seen doing the wave. In an announcement made on its website, the network said it had teamed up with Silver Spoon Animation and SMT “to deliver an elevated viewing experience to sports fans around the nation.”