Can you sue a ballpark for being hit by a foul ball?

Imagine being hit by a speeding baseball.

It happened here in Houston with a toddler at Minute Maid. According to her family, she sustained a fractured skull and now they've hired an attorney.

On Monday, a Dodgers fan was hit by a baseball, and back on June 11, a White Sox fan was hit by a ball as well.

Can you sue a ball park if you're hit by a baseball despite there being waivers in place, and what should be done about protecting the fans?