745 ILCS 38/10

The owner or operator of a baseball facility shall not be liable for any injury to the person or property of any person as a result of that person being hit by a ball or bat unless: (1) the person is situated behind a screen, backstop, or similar device at a baseball facility and the screen, backstop, or similar device is defective (in a manner other than in width or height) because of the negligence of the owner or operator of the baseball facility; or (2) the injury is caused by willful and wanton conduct, in connection with the game of baseball, of the owner or operator or any baseball player, coach or manager employed by the owner or operator.