During Tuesday nights Cub's game against the Marlins, a fan flashed a symbol which has been adopted as a white power symbol and has caught himself a lifetime ban from Wrigley Field. 

Cub's Team President Theo Epstein made the annoucement Wednesday about the incident which had gone viral. 

"We've made clear how egregious and unacceptable. That behavior has no place for it in our society, in baseball, certainly no place for it at Wrigley Field. The person responsible for that gesture will never be welcomed back at Wrigley Field. I think it's important to have a strong response to send a message that this is a place of inclusion."

To learn more about he history of the symbol and its ties to white supremacy, check out this article over at KnowYourMeme about the "ok symbol".