The website said attendance has dropped compared to last year amid similar drops in attendance for other U.S. sports including basketball, football, college football and motor sports, CNBC reported Wednesday.
Attendance has been so low for the Miami Marlins, whose home games are the least attended in the league, that officials have decided to close the upper bowl of the stadium during some games.
The New York Yankees have seen a decline of nearly 2,500 fans in attendance per game while the Boston Red Sox saw their 820-game sellout streak end this season.
"The drop-off in attendance for live sporting events is getting worse," said Lee Igel, a professor of sports management at New York University.
"You've got a lot of competing factors in this, even bad weather," Igel explained. "But with the economy still sorting itself out, there's the huge cost of going to live events plus fighting through traffic and parking just to get to the games."
"And even more important is the experience of watching games in the comfort of your home on a big screen without the hassle at a stadium," Igel said. "That keeps a lot of people away."
Biologists detail four new deep-sea 'killer sponges'
Pistorius testifies he didn't consciously pull trigger when he shot girlfriend