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More than 20 children from ages six to 17 who were treated for brain tumors, head traumas and spinal tumors played alongside the surgical team from the NewYork-Presbyterian/Weill Cornell Komansky Center for Children's Health.

"It's like so amazing, because there are so many kids who had so many different kids' things, so you don't have to worry about people not understanding," said patient Alyssa Teter.

"NewYork-Presbyterian/Weill Cornell's neurosurgeons saved my life. Their names were Dr. Greenfield and Dr. Suden, to me they're like my angels," said brain tumor survivor Anthony Zerato. "When I was sick, they helped me get better, and now I have angels for the rest of my life."

Another participant, 10-year-old Adrian Willis, suffers from Danny Walker syndrome. For Adrian's parents, watching him play and run around the bases was unbelievable.

"You're looking at a child who started off not walking until he was four years old, not being able to climb and run," said Sherline Willis, Adrian's mother.

The doctors, who doubled as head coaches, also used the event to remind families about preventing head injuries.

"When we operate on children, this sort of becomes a family for us. And these are kids we will see for the rest of their childhood," said Dr. Jeffrey Greenfield of Weill Cornell.

"All too often every summer in New York City, we see too many children who are brought in under our care with regards to bad brain injuries," said Dr. Mark Souweidane, the director of pediatric neurological surgery. "Many devices that are designed for the prevention of head injury, stemming from seatbelts to child restraints to helmets, all these in many ways prevent the byproduct of brain injury in children."

It was a lesson many of the parents paid close attention to as they celebrated their children's new lease on life.