Cubs outfielder Albert Almora Jr. lined a foul ball into the seats past his team's dugout along the third-base line in the top of the fourth inning of Wednesday night's game against the Astros at Minute Maid Park in Houston.
The ball hit a young girl.
Almora said he knew something was wrong immediately.
"As soon as I hit it, the first person I locked eyes on was her," he said. "I want to put a net around the whole stadium."
The Astros said in a statement after the game that the girl was taken to a hospital.
"We are not able to disclose any further details at this time," the team said. "The Astros send our thoughts and prayers to the entire family."
The incident again has raised the issue of safety at baseball games.
"The events at last night's game were extremely upsetting," Major League Baseball said in a statement Thursday. "We send our best wishes to the child and family involved. Clubs have significantly expanded netting and their inventory of protected seats in recent years. With last night's event in mind, we will continue our efforts on this important issue."
But many questions remain.
